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Speaker 1: Imagine waking up tomorrow morning. The sun is shining, the

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birds are singing outside your window, and it just it

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feels like a completely normal Tuesday, right.

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Speaker 2: Just your average start to the day.

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Speaker 1: Exactly. You stumble into the kitchen, you know, rubbing your eyes,

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and you reach over to turn on the coffee maker,

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but nothing.

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Speaker 2: Happens, not even the little clock display.

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Speaker 1: Yeah, exactly. There's no little beep, no glowing green light

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on the screen, so you just assume, oh, it's a

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trip breaker. You grab your phone to use the flashlight,

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maybe check if there's an outage reported in your.

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Speaker 2: Area, but the phone is dead too.

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Speaker 1: Completely dead. I mean not just a depleted battery, but

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permanently bricked. It's just this heavy, totally useless block of

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glass and metal in your hand.

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Speaker 2: Which is when the panic starts to set in.

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Speaker 1: Oh absolutely, because then you look out the window and

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cars are stalled out right in the middle of the street.

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Drivers are stepping out looking totally bewildered because their electronic

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ignition systems have just completely fried.

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Speaker 2: They have no idea would.

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Speaker 1: Just hit them, none. And it takes a few hours

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for the full reality to really set in. Water stops

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flowing from your tap because the municipal pumps have failed.

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The supply chains that deliver your food are completely frozen.

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Speaker 2: The financial networks the banks erased.

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Speaker 1: All your money gone, the intricate web of satellites coordinating

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global logistics, GPS communications, all of it gone in an instant.

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This isn't just like a temporary.

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Speaker 2: Black app No, this is a total paradigm shift.

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Speaker 1: It's a permanent, non negotiable return to the eighteen hundreds.

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And the crazy part is all of this happens because

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an invisible, silent wave of magnetic energy struck the Earth

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with only a few hours of warning, just a few hours.

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Speaker 2: Let that sink in for a second.

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Speaker 1: But here is the truly insane part that scenario, the

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complete collapse of the modern electrical world. That is actually

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the absolute least destructive thing we are going to be

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talking about today.

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Speaker 2: It is a profoundly sobering thought to sit with. Honestly, Yeah,

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because we build our entire lives, our economies, our daily

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routines around this baseline assumption of stability.

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Speaker 1: We just assume everything's fine.

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Speaker 2: Right. We look up and we assume the sky above

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us is this quiet, predictable ceiling that just happens to

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look pretty at night.

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Speaker 1: Well, welcome to thrilling threads. Today, we are unraveling a

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massive collection of astrophysical data to explore cosmic phenomena that

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make black holes look like I don't know, harmless potholes

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on a country road.

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Speaker 2: Harmless potholes. I like that, But it's true.

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Speaker 1: Yeah, because we treat the night sky as this peaceful

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static painting. You know, you go stargazing, you write poetry

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about the constellations, but the actual physical reality of the

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universe that you were sitting in right now is a

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deeply hostile, dynamic and just unfathomably violent arena.

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Speaker 2: And you know, setting the right tone here is super crucial.

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We aren't mapping out these colossal dangers to induce fear

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or some kind of existential dread.

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Speaker 1: Right, We aren't trying to ruin anyone's day here.

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Speaker 2: No, not at all. It's actually about gaining a profound,

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almost spiritual appreciation for the razor thin margin that allow

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human civilization and biological life in general to exist at all.

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Speaker 1: The margins are so thin, they really are.

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Speaker 2: We are living in a remarkably delicate state of equilibrium.

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When you truly grasp the mechanics of what is happening

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out there in the dark. The fact that you and

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I are here having this conversation feels less like an

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inevitable expectation and well more like a mathematical miracle.

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Speaker 1: Yeah, a total miracle. So let's look right at the

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threat literally warming our faces. We naturally view our sun

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as this benevolent, life giving companion, right.

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Speaker 2: Of course, it drives photosynthesis, dictates our seasons exactly.

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Speaker 1: It's the reason we can go to the beach. But

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based on the data we are reviewing today, treating the

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Sun like a gentle warming campfire is wildly inaccurate. Wildly

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It's more like a neighbor who secretly harbors a massive,

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unstable nuclear arsenal in their basement, and we're just kind

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of sitting here hoping the safety mechanisms don't glitch.

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Speaker 2: And the underlying physics of our star definitely support that analogy. Yeah,

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I mean, the Sun is a massive new furnace and

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its surface is just a chaotic, boiling soup of plasma.

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Speaker 1: It's constantly churning.

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Speaker 2: Right, and this plasma is governed by incredibly complex twisting

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magnetic fields. Because the Sun isn't solid, you know it's

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equator actually rotates faster than its poles. These magnetic field

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lines get wound up tighter and tighter over time.

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Speaker 1: Like twisting a rubber band until it's about to snap.

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Speaker 2: Exactly like that. Eventually the tension just becomes too great.

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The fields twists, they snap, and they reconnect with catastrophic violence.

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Now we are familiar with standard solar flares.

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Speaker 1: Yeah, those are the ones that give us those beautiful auroras.

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Speaker 2: Right, Yeah, the northern lights, they're relatively mild. But the

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historical data we now have access to reveal something much

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much darker. A few years ago, researchers analyzing ancient tree

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rings discovered terrifying evidence of an event that occurred around

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the year seven to seventy four CE.

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Speaker 1: Okay, I want to spend a second on how we

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even know this, because the mechanism itself is just fascinating.

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I always assumed astronomy was just you know, looking through telescopes.

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Speaker 2: A lot of it is, but not all of it.

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Speaker 1: Right, because here we are pulling astrophysical data from wood,

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from literal trees. If I understand the process correctly, when

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highly energetic cosmic rays or massive solar particles strike the

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Earth's atmosphere. They don't just bounce off harmlessly. No, they

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carry immense kinetic energy, right, they physically collide with atmospheric nitrogen.

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Speaker 2: They do, and that high energy collision fundamentally alters the nitrogen.

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It knocks subatomic particles around and actually transmutes that nitrogen

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into carbon fourteen, which is.

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Speaker 1: A radioactive isotope, precisely. And trees, because they breathe in

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carbon dioxide to build their trunks, they incorporate that carbon

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fourteen directly into their annual growth rings.

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Speaker 2: This is amazing, really it is.

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Speaker 1: It's like a permanent biological tape recorder for radiation. So

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scientists looking at ancient cedars in Japan found this massive

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sudden spike in carbon fourteen precisely in the ring corresponding

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to the year seven to seventy four.

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Speaker 2: The Earth got absolutely blasted by radiation that year.

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Speaker 1: Blasted, and the peasants farming in Europec then wouldn't have

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noticed a thing, right.

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Speaker 2: A blast of a magnitude we have never recorded in

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modern history. The data indicates this specific solar event, which

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is often referred to as a Meac event, named after

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the physicists who discovered the spike was at least twenty

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times more powerful than any solar flare ever recorded in

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the industrialized era.

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Speaker 1: Twenty times wow.

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Speaker 2: Yeah. And as researchers expanded their scope looking at ice

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cores from Antarctica in Greenland, they found a pattern. These

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civilization threatening solar superflares seemed to occur roughly once every millennium.

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Speaker 1: So, like I said, if a massive radiation spike happened

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in seven seventy four CE, a scribe in the Tang

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dynasty or a farmer wouldn't have cared. Maybe the northern

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lights were visible at the equator, but their daily lives

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wouldn't change.

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Speaker 2: They were completely insulated by their lack of technology.

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Speaker 1: Right. But today our entire existence relies on a fragile

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web of highly sensitive electronics.

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Speaker 2: The consequences for our modern civilization would be instantaneous and catastrophic.

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We are talking about the release of magnetic energy equivalent

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to billions of megaton hydrogen bombs detonating simultaneously on the

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Sun's surface.

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Speaker 1: That's just an unfathomable amount of power it is.

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Speaker 2: The immediate blow comes from the resulting electromagnetic pulse or EMP,

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which is driven by a massive cloud of charged particles

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called a coronal mass ejection.

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Speaker 1: And when that hits Earth, when.

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Speaker 2: That plasma slams into Earth's magnetic field, it compresses it,

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inducing massive uncontrolled electrical currents in anything conductive on the ground, like.

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Speaker 1: Long distance power lines.

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Speaker 2: Exactly, those power lines act as giant antennas for this energy.

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They capture that geomagnetically induced current and funnel it directly

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into the massive transformers that form the very backbone of

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the global power grid. It would instantly overwhelm them.

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Speaker 1: And these transformers aren't exactly items you can just replace

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with a quick trip to the hardware store.

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Speaker 2: Right, not at all. They are custom built, highly specialized

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behemoths that take months or even years to manufacture. They

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often require specialized steel that is only produced in a

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few facilities worldwide.

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Speaker 1: So we couldn't just swap them out.

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Speaker 2: No, the grid would just trip as a circuit breaker.

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The copper internals of these transformers would literally.

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Speaker 1: Melt, melt, just completely liquify inside.

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Speaker 2: Yeah, and simultaneously, the satellites in orbit, the ones managing

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our global communications GPS weather forecasting, they would be completely

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fried by the radiation.

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Speaker 1: I remember a localized power outage in my city that

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lasted for three days during a winter storm. And you know,

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by day two the grocery store shelves were stripped bare.

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The gas stations couldn't pump fuel because the pumps need electricity.

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Speaker 2: Society breaks down very quickly.

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Speaker 1: Without power, it really does. There was this palpable, creeping

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sense of panic. The realization that our entire society is

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basically a delicate technological Jenga tower is deeply unsettling.

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Speaker 2: It's a house of cards.

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Speaker 1: Yeah. We built the Internet, our financial systems, our refrigeration logistics,

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all of it entirely during a rare, temporary period of

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solarcom We've never actually stress tested our civilization against what

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the sun is truly capable of.

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Speaker 2: And we've had terrifyingly close calls that the general public

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is largely unaware of.

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Speaker 1: Wait really like recently, oh yeah, in July.

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Speaker 2: Of twenty twelve, our sun unleached a massive coronal mass ejection.

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It was comparable to, and likely stronger than, the infamous

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eighteen fifty nine Carrington event.

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Speaker 1: The Carrington event that's the one with the telegraphs right.

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Speaker 2: Yes. During the Carrington event, the geomagnetic storm was so

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intense that telegraph papers spontaneously caught fire. Operators were actually

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able to disconnect their batteries and send messages using only

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the ambient electrical current surging through the wires from the sky.

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Speaker 1: That is insane ambient sky electricity powering telegraphs. But the

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twenty twelve event it missed us.

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Speaker 2: It missed earth exact position by just nine days, n days,

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nine days. It erupted and blasted through the exact orbital

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path our planet had vacated just over a week prior

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nine days.

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Speaker 1: That is a cosmic fraction of a second. I mean,

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if that had hit us, we'd be having this conversation

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via carrier pigeon right now, assuming we had figured out

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how to feed ourselves without industrialized agriculture.

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Speaker 2: It would have been a global reset.

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Speaker 1: And the terrifying part is our absolute inability to prevent it.

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We are entirely at the mercy of stellar physics. The

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next civilization altering flare could begin its ninety three million

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mile journey from the Sun at literally any moment.

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Speaker 2: And we wouldn't have much warning.

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Speaker 1: Right It takes about eight minutes for the light to

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reach us warning us that the flare occurred, and then

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we'd have perhaps a day, maybe just hours before the

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physical particles slam into our magnetic.

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Speaker 2: Field, giving us a few hours to prepare for a

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permanent return to a pre electrical age.

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Speaker 1: Which is just wow. So if our own sun is

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a loose cannon, the natural logical leap is to wonder

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about the rest of the namemborhood, like is the Sun

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uniquely volatile? Or is this just par for the course?

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Should we be looking for a quieter star to eventually

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migrate to.

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Speaker 2: That's a very human reaction. Let's just pack up.

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Speaker 1: And move right But diving into the source material about

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the wider galaxy, the reality of interstellar space is actually

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far more hostile than our local solar system.

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Speaker 2: Moving wouldn't solve our problems at all, because our current

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location in the galaxy is historically and geographically incredibly lucky lucky.

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How well to grasp this we have to look at

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a monumental achievement in astronomy published recently. In twenty twenty two,

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astronomers utilized incredibly precise data from the Gaya spacecraft.

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Speaker 1: Okay, I've heard of Gaya. What does it do exactly?

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Speaker 2: Gaya is a space observatory specifically designed to map the

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exact positions, distances, and three dimensional motions of over a

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billion stars in our galaxy.

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Speaker 1: A billion stars. That's a lot of data.

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Speaker 2: It's an unprecedented data set, and using it, scientists completed

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the first comprehensive map of our immediate cosmic neighborhood. And

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what they found completely overturned our basic assumptions about the

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space between the stars.

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Speaker 1: Right, because we tend to think of the interstellar medium

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as just this uniform, empty void, like just black nothingness.

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But we aren't just drifting through empty space, are we not?

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Speaker 2: At all? The Gaya data revealed that our entire Solar

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system actually sits perfectly inside an enormous bubble of hot,

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extremely tenuous plasma that stretches nearly one thousand light.

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Speaker 1: Years across a thousand light years.

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Speaker 2: Yes, astronomers officially called this the local bubble.

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Speaker 1: Okay, when you say bubble, I want to make sure

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I'm visualize this correctly. Do you mean an actual physical

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cavity in space, like a region where the density of

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matter is noticeably different from the outside.

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Speaker 2: Yes, it is a massive hollow cavity. The data shows

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that this local bubble was violently carved out by a

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sequence of approximately fifteen different supernovae massive exploding stars detonating

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over the past fourteen million years.

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Speaker 1: Fifteen supernova just going off in our neighborhood exactly.

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Speaker 2: And when a stargo supernova, it creates an unimaginably powerful shockwave.

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This chalk wave acts like a cosmic snowplow.

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Speaker 1: Snowplow, okay, I can picture that.

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Speaker 2: It sweeps up the dense cold interstellar gas and dust,

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pushing it outward to the edges to form a dense shell,

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and leaving behind this massive empty void filled with incredibly

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thin hot plasma.

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Speaker 1: So it's quite literally a blast crater. A blast crater

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a thousand light years.

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Speaker 2: Wide, that's exactly what it is.

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Speaker 1: And because it's been cleared of that dense interstellar medium,

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the ambient cosmic radiation levels inside this bubble are dramatically reduced.

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But here at the detail that really gave me pause

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when I was reading through this. Our Sun wasn't actually

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born inside this bubble, No, it wasn't. The galactic mapping

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demonstrated that our solar system only drifted into this highly

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protective cavity about five to six million years ago.

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Speaker 2: And the timing of that entry is one of the

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most provocative correlations in modern science.

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Speaker 1: It really is. Five to six million years ago coincides

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exactly with the dramatic acceleration of human evolution. That's the

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era when early hominids like Austrolopithecus started walking upright.

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Speaker 2: Timeline matches up perfectly.

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Speaker 1: It forces this totally radical thought. The only reason you,

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the listener, have the brain capacity to listen to this

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audio right now is because a few million years ago

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our solar system wandered into a cosmic blast crater.

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Speaker 2: It's a staggering realization.

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Speaker 1: Is our evolution directly tied to finding a safe harbor

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in the galaxy.

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Speaker 2: The correlation strongly suggests a causal link. Inside this local bubble,

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our planet's exposure to deadly cosmic rays is reduced by

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a massive factor between two to ten times lower than

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in the denser, more typical regions of interstellar space.

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Speaker 1: Which makes a huge difference for biology.

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Speaker 2: A critical difference. High radiation environments are incredibly hostile to

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complex biology. They cause erratic, often fatal genetic mutations, and,

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as we will discuss later, they heavily disrupt planetary climates.

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The stable, relatively peaceful conditions required for complex high intelligence

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life to evolve over millions of uninterrupted years might physically

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only be possible inside these rare protective bubbles.

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Speaker 1: This completely reframes the Fermi paradox for me. You know,

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we always ask, if the universe is so big, where

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are all the aliens? We assume the galaxy should be

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teeming with life, and we wonder why they aren't answering

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our radio calls.

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Speaker 2: We assume everywhere is as hospitable is here exactly.

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Speaker 1: But if the data suggests that only an estimated three

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to ten percent of the entire Milky Ways volume consists

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of these low density safe bubbles, then the vast majority

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of our galaxy is actually a hostile, sterilized wasteland.

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Speaker 2: That is the grim emerging reality of galactic geography. The vast,

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overwhelming majority of potentially habitable exoplanets exist in regions that

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are constantly violently bumpbarded by ambient radiation.

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Speaker 1: From what like other star.

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Speaker 2: From nearby supernovae, rapidly spinning pulsars, and hyperactive stellar nursers.

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Speaker 1: So we aren't alone because the universe is empty. We

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might just be trapped in isolated protective bubbles separated by

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vast uncrossable radiation deserts.

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Speaker 2: It's a very lonely picture.

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Speaker 1: It is. Think of it like living on a tiny,

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lush island in the middle of a toxic, boiling ocean.

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You can't leave the island because the environment outside will

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literally kill you. And if there happens to be someone

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on another island a thousand light years away, they can't

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cross the ocean to reach you either.

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Speaker 2: The ocean is just too lethal.

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Speaker 1: Right, So the silence we hear when we point our

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radio telescopes at the sky isn't necessarily an absence of life.

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It's a cosmic quarantine imposed by radiation.

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Speaker 2: It completely shifts our view of the galactic map. We

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often visualize black holes or active stars as these localized

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hazards on the map, you know, like a dangerous swamp

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you walk around.

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Speaker 1: Yeah, just avoid that one spot.

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Speaker 2: But this intense background radiation isn't just a hazard on

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the map. It is the map. The safe zones, like

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our low bubble are the actual statistical anomalies, which.

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Speaker 1: Naturally leads to a terrifying realization. If we are only

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safe because we drifted into this bubble five million years ago,

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what happens when our solar system's orbit eventually takes us

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out of it.

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Speaker 2: Because we certainly aren't sitting still exactly.

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Speaker 1: We are orbiting the supermassive black hole at the center

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of the Milky Way. And as I read through the

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research on our galactic orbit, I realized my mental model

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was completely wrong.

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Speaker 2: How so well?

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Speaker 1: I always picture the Solar system moving like a record

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spinning on a turntable, you know, a nice flat, predictable

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circle around the center. But it's not a flat track.

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It's more like a cosmic carousel.

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Speaker 2: The cosmic carousel is a brilliant way to conceptualize the

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physics at play here. The galactic disc isn't paper thin.

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It has a defined thickness packed with varying densities of mass.

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Speaker 1: Right, it's chunky, very chunky.

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Speaker 2: As our Solar system orbits the galactic center, which is

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a grand journey that takes about two hundred fifty million

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years to complete, we don't just move forward in a straight,

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flat line. We bob yes. The collective gravitational push and

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pull of the galaxy's mass causes our Solar system to

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bob up and down, oscillating above and below the galactic

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plane as we.

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Speaker 1: Move forward like a horse on a carousel.

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Speaker 2: Exactly, and this vertical oscillation has a measurable cycle of

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approximately sixty four to seventy four million years.

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Speaker 1: Meaning that roughly every thirty two to thirty seven million

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years we plunged directly through the dense, crowded center of

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the galactic midplane.

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Speaker 2: We do, and when we cross that threshold, the local

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cosmic weather changes draftically. This is where research conducted by

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scientists at the University of Kansas, which has been corroborated

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by multiple recent astrophysical studies, becomes profoundly disturbing.

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Speaker 1: Disturbing is the right word.

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Speaker 2: They identified a chilling correlation. The galactic midplane is effectively

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the most dangerous neighborhood in the galaxy. It contains the

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absolute highest density of supernova remnants, deadly high energy pulsars,

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and active star forming regions, all.

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Speaker 1: The stuff pumping out radio, all of it.

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Speaker 2: All of these celestial objects violently blast the surrounding space

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with high energised of atomic particles. So when Earth crosses

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this dense, chaotic layer, our planet's exposure to cosmic rays

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surges massively.

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Speaker 1: Okay, I really want to dig into the how of this,

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Because a massive surge in cosmic rays sounds like a vague,

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almost abstract threat. It's not like a sci fi movie

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where people suddenly get superpowers or melt on the spot.

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Speaker 2: Sadly, no superpowers, right.

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Speaker 1: It triggers a slow, systematic cascade of ecological failure. So

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how does radiation in space destroy life on the ground.

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Speaker 2: It is a fascinating deadly chain reaction of atmosphere chemistry.

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When these high energy cosmic rays bombard our upper atmosphere,

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they carry so much energy that they literally knock electrons

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off atmospheric molecules.

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Speaker 1: Which heavily ionizes the air.

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Speaker 2: Yes, and this sudden surge in ionized particles acts as

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a massive seating ground for excessive runaway cloud formation.

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Speaker 1: Oh, because water vapor clings to the ions.

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Speaker 2: Exactly, a sudden, massive increase in global cloud cover drastically

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increases the Earth's albedo, meaning it reflects the Sun's heat

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back into space. This sudden, severe cooling can potentially trigger

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deep abrupt.

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Speaker 1: Iceaser if that alone its catastrophic.

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Speaker 2: It is, but the chemical changes are even more destructive.

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Speaker 1: Because the ionizing radiation breaks apart nitrogen gas. Right.

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Speaker 2: Yes, our atmosphere is roughly seventy eight percent nitrogen. The

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cosmic rays violently fracture these nitrogen molecules, and the free

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nitrogen atoms immediately bond with oxygen to produce massive amounts

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of nitrogen oxides.

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Speaker 1: And nitrogen oxides are bad news.

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Speaker 2: They are incredibly efficient at destroying ozone. They act as

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a powerful catalyst, systematically tearing apart the ozone molecules that

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form our planetary shield.

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Speaker 1: So we lose the ozone layer, which then allows deadly

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unfiltered ultraviolet radiation from the Sun to scorch the surface

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of the planet.

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Speaker 2: And that uv radiation is lethal.

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Speaker 1: It kills off surface dwelling land life and critically destroys

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the phytoplankton in the oceans, and since phytal plankton forms

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the absolute base of the entire global food web, the

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whole ecosystem basically collapses.

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Speaker 2: It's a domino effect. Furthermore, the overall background radiation directly

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elevates genetic mutation rates and cancer risks across the entire

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surviving biosphere, just.

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Speaker 1: A miserable time to be alive.

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Speaker 2: Truly, researchers have found strong statistical correlations between these specific

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galactic plane crossings and major mass extinction events. Very deep

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in Earth's fossil record.

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Speaker 1: It essentially creates a cyclical cosmic reset button.

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Speaker 2: That's a very apt way to describe it.

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Speaker 1: It is tragically ironic. I mean, put yourself in the

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perspective of an alien civilization evolving in one of those

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denser regions. You evolve, you figure out agriculture, you build cities,

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You finally invent electricity and microchips, which, by the way,

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are exquisitely vulnerable to ionizing radiation, extremely vulnerable, and just

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as you are about to reach out to the stars,

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the cosmic metronome ticks. You plunge into the midplane, your

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power grids collapse from the radiation, your climate freezes from

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the cloud cover, and your entire society is completely destroyed.

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By a predictable geographic.

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Speaker 2: Cycle, intelligence might evolve repeatedly across the galaxy, only to

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be systematically wiped out every thirty million years.

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Speaker 1: They rise and fall in a tragic rhythm, never overlapping,

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and that.

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Speaker 2: Adds another incredibly grim layer to the Fermi paradox. If

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civilizations are routinely forced back underground or to pre industrial

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conditions by the fundamental geography of their own galaxy, achieving

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true long term interstellar communication might be temporarily impossible.

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Speaker 1: The window is just too small.

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Speaker 2: The window of opportunity is simply too narrow before the

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galaxy resets the board.

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Speaker 1: But the danger isn't just the geography of our galaxy.

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The galaxy itself is an active threat. This brings us

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to a phenomenon that sounds like a sci fi horror movie,

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galactic cannibalism.

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Speaker 2: It does sound like a movie title, it really does.

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Speaker 1: We look up at the Milky Way and it looks

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majestic and incient and peaceful, but it has this violent,

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bloodthirsty secret. It isn't just passively sitting there.

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Speaker 2: No, our home galaxy is a relentless cosmic predator. It

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actively consumes smaller dwarf galaxies that make the fatal mistake

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of venturing too close to its overwhelming gravitational.

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Speaker 1: Pull just eats them whole.

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Speaker 2: And it's vital to understand that this isn't just ancient

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history from the dawn of the cosmos. It is happening

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right now, actively directly above our heads. At this very moment,

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the immense tidal forces of Milky Way are mercilessly tearing

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apart and devouring the Sagittarius Dwarf's ferroidal galaxy.

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Speaker 1: Okay, how do we even know that's happening. It's not

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like watching a lion eat an antelope on a Nature documentary.

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These things take millions of years. How can astronomers look

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at the sky and see a galaxy being eaten in

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real time?

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Speaker 2: Because we can observe the digestive remains.

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Speaker 1: Digestive remain.

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Speaker 2: Literally, the evidence is written right across the night sky

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in the form of massive, long rivers of stars called

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stellar streams. The Helm stream and the Virgo stellar stream

474
00:23:57,640 --> 00:23:58,799
are prime examples of this.

475
00:23:58,880 --> 00:24:03,039
Speaker 1: So these are just rivers of stars flowing weirdly exactly.

476
00:24:03,400 --> 00:24:05,799
Speaker 2: Astronomers don't just look at where a star is. They

477
00:24:05,839 --> 00:24:09,559
analyze its distinct chemical composition, what we call its metallicity.

478
00:24:10,160 --> 00:24:13,599
Stars born in the Milky Way share a certain chemical fingerprint,

479
00:24:13,759 --> 00:24:16,799
like a barcode, a cosmic bar code. Yes, but these

480
00:24:16,799 --> 00:24:21,240
stellar streams have a completely different metallicity, and they follow bizarre,

481
00:24:21,519 --> 00:24:25,039
non conforming orbital paths that cut right across the standard

482
00:24:25,039 --> 00:24:25,880
galactic rotation.

483
00:24:26,079 --> 00:24:28,359
Speaker 1: Ah, so they stand out very clearly.

484
00:24:29,000 --> 00:24:32,160
Speaker 2: The data definitively shows that these stars were not born here.

485
00:24:32,599 --> 00:24:35,200
They are immigrants from cosmic bodies that have been completely

486
00:24:35,240 --> 00:24:38,200
swallowed whole and are currently being stretched and torn to

487
00:24:38,240 --> 00:24:40,079
shreds by our galaxies gravity.

488
00:24:40,359 --> 00:24:43,880
Speaker 1: Okay, here is the chilling implication of that. If the

489
00:24:43,920 --> 00:24:47,599
Sagittarius Dwarf galaxy is actively being ripped apart and its

490
00:24:47,640 --> 00:24:50,839
stars are being scattered through our neighborhood, I mean, if

491
00:24:50,880 --> 00:24:53,759
intelligent lights ever evolved on a planet around one of

492
00:24:53,759 --> 00:24:57,880
those stars, their stellar remnants are passing directly through our

493
00:24:57,920 --> 00:24:59,359
cosmic neighborhood right now.

494
00:25:00,039 --> 00:25:04,240
Speaker 2: Robertal models mathematically support that, Yes, stars originally belonging to

495
00:25:04,279 --> 00:25:07,279
the Sagittarius Dwarf could be within just fifty thousand light

496
00:25:07,359 --> 00:25:09,279
years of our solar system currently.

497
00:25:09,079 --> 00:25:12,559
Speaker 1: Which is pretty close galactically speaking, very close.

498
00:25:12,880 --> 00:25:16,799
Speaker 2: If any of those consumed stars once hosted advanced civilizations,

499
00:25:17,119 --> 00:25:21,279
the physical remnants of their technological achievements, the ruined megastructures,

500
00:25:21,359 --> 00:25:25,240
or even their ancient, dormant interstellar probes could be silently

501
00:25:25,319 --> 00:25:26,039
drifting through.

502
00:25:25,880 --> 00:25:27,640
Speaker 1: Our galaxy right alongside us.

503
00:25:27,839 --> 00:25:31,400
Speaker 2: Right alongside us, acting as actual tombstones for a consumed world.

504
00:25:31,559 --> 00:25:34,839
Speaker 1: It's basically a haunted graveyard drifting past our front porch,

505
00:25:35,319 --> 00:25:37,200
and the Milky Way is never going to be satisfied.

506
00:25:37,240 --> 00:25:40,160
As it our galaxy is basically just fattening itself up

507
00:25:40,200 --> 00:25:41,599
for the ultimate collision.

508
00:25:41,839 --> 00:25:45,119
Speaker 2: The grand finale of our local group is inescapable. In

509
00:25:45,160 --> 00:25:48,839
approximately four point five billion years, the Milky Way will

510
00:25:48,880 --> 00:25:52,519
collide head on with the massive Andromeda galaxy, a big one,

511
00:25:52,640 --> 00:25:55,160
the really big one. It's an event that will ultimately

512
00:25:55,200 --> 00:25:59,599
merge the two into a single, gargantuan elliptical galaxy. During

513
00:25:59,599 --> 00:26:03,759
this color colossal collision, the gravitational chaos will be unimaginable.

514
00:26:03,880 --> 00:26:05,440
Speaker 1: Will stars actually hit each other?

515
00:26:06,039 --> 00:26:10,079
Speaker 2: Actually no, While the distances between individual stars are so

516
00:26:10,279 --> 00:26:14,200
vast that direct collisions are incredibly rare, the gravitational tidal

517
00:26:14,240 --> 00:26:18,400
forces will be violently disruptive. Entire stars systems will be

518
00:26:18,480 --> 00:26:21,440
violently flung out of the new galaxy into the freezing

519
00:26:21,519 --> 00:26:23,519
darkness of interdalactic.

520
00:26:22,799 --> 00:26:24,960
Speaker 1: Space, just ejected completely or.

521
00:26:24,880 --> 00:26:28,599
Speaker 2: Crushed together in immense cosmic pilots, triggering frantic bursts of

522
00:26:28,640 --> 00:26:31,440
star formation that will rapidly exhaust the remaining gas.

523
00:26:31,480 --> 00:26:34,519
Speaker 1: What gets me about galactic cannibalism is the complete and

524
00:26:34,640 --> 00:26:39,319
utter erasure it represents entire cosmic ecosystems, billions of stars,

525
00:26:39,680 --> 00:26:43,559
millions of potentially inhabited worlds. They are consumed and digested

526
00:26:43,599 --> 00:26:46,200
until they lose every trace of their original identity.

527
00:26:46,240 --> 00:26:47,480
Speaker 2: They are completely subsumed.

528
00:26:47,839 --> 00:26:51,880
Speaker 1: Yeah, our own galaxy, everything we know is built literally

529
00:26:51,920 --> 00:26:55,960
from the corpses of countless other galaxies, and someday the

530
00:26:56,079 --> 00:26:59,160
very atoms making up our planet and us will just

531
00:26:59,200 --> 00:27:03,079
be recycled into some larger, unrecognizable structure. A black hole

532
00:27:03,200 --> 00:27:06,960
consumes a few stars, a galaxy consumes billions. It's the

533
00:27:07,039 --> 00:27:08,640
ultimate loss of identity.

534
00:27:08,960 --> 00:27:12,359
Speaker 2: It is a profound demonstration of impermanence on a scale

535
00:27:12,400 --> 00:27:14,920
the human mind truly struggles to hold well.

536
00:27:14,960 --> 00:27:18,200
Speaker 1: We've talked about threats that take millions or billions of

537
00:27:18,279 --> 00:27:20,880
years to unfold, you know, the slow grind of galaxies.

538
00:27:21,359 --> 00:27:23,400
But I want to pivot to forces that can strike

539
00:27:23,519 --> 00:27:29,119
instantly from unimaginably far away, invisible polls and intergalactic snipers.

540
00:27:29,400 --> 00:27:32,119
And let's start with a mystery that genuinely makes me uncomfortable,

541
00:27:32,599 --> 00:27:33,559
The Great Attractor.

542
00:27:33,720 --> 00:27:36,440
Speaker 2: The Great Attractor remains arguably one of the most unsettling

543
00:27:36,480 --> 00:27:38,160
discoveries in modern cosmology.

544
00:27:38,359 --> 00:27:39,200
Speaker 1: Unsettling is right.

545
00:27:39,519 --> 00:27:41,359
Speaker 2: We understand that everything in the universe is in motion.

546
00:27:41,559 --> 00:27:43,920
The Earth spins, it orbits, the Sun, the Sun orbits

547
00:27:43,920 --> 00:27:47,160
the galactic center. But in the nineteen seventies astronomers began

548
00:27:47,240 --> 00:27:51,039
mapping the cosmic microwave background and noticed a bizarre anomaly

549
00:27:51,319 --> 00:27:54,599
in the grander overarching movement of our local universe.

550
00:27:54,759 --> 00:27:56,599
Speaker 1: Something wasn't adding up exactly.

551
00:27:57,240 --> 00:28:01,160
Speaker 2: We know the universe is expanding, so generally galaxies should

552
00:28:01,200 --> 00:28:05,039
all be moving away from each other uniformly. However, they

553
00:28:05,119 --> 00:28:08,279
found that the Milky Way, along with hundreds of thousands

554
00:28:08,279 --> 00:28:12,319
of other galaxies in our local supercluster, possessed an additional,

555
00:28:12,640 --> 00:28:14,240
highly specific velocity.

556
00:28:14,680 --> 00:28:17,039
Speaker 1: So we're moving sideways while expanding.

557
00:28:17,079 --> 00:28:20,119
Speaker 2: We aren't just expanding outward. We are all being dragged

558
00:28:20,160 --> 00:28:23,359
collectively toward one specific, localized region in.

559
00:28:23,319 --> 00:28:26,079
Speaker 1: Space, dragged at an insane speed.

560
00:28:25,799 --> 00:28:29,160
Speaker 2: Right astonishedly fast, approximately fourteen million.

561
00:28:29,000 --> 00:28:30,640
Speaker 1: Miles per hour fourteen million.

562
00:28:30,759 --> 00:28:33,279
Speaker 2: To put that velocity into perspective, that is fast enough

563
00:28:33,359 --> 00:28:35,319
to travel from the Earth to the Moon in just

564
00:28:35,359 --> 00:28:38,240
over a minute. A minute, we along with our entire

565
00:28:38,279 --> 00:28:41,240
galactic neighborhood, are hurtling toward a point about one hundred

566
00:28:41,240 --> 00:28:43,680
and fifty million light years away in the direction of

567
00:28:43,680 --> 00:28:45,200
the hydrosen Tourist supercluster.

568
00:28:45,880 --> 00:28:47,720
Speaker 1: But okay, I need to push back on this, because

569
00:28:47,720 --> 00:28:50,839
the physics of this discovery rely on a major blind spot.

570
00:28:51,039 --> 00:28:53,920
The sources state that this great attractor lies in something

571
00:28:54,000 --> 00:28:57,240
called the zone of avoidance, which basically means it's hidden

572
00:28:57,279 --> 00:29:00,400
directly behind the dense dust, gas, and star of our

573
00:29:00,440 --> 00:29:03,880
own Milky Way center. That is correct, We physically cannot

574
00:29:03,920 --> 00:29:06,720
see what is pulling us. So how can we possibly

575
00:29:06,720 --> 00:29:09,240
trust the science of something we are entirely blind to.

576
00:29:09,720 --> 00:29:13,240
Couldn't this just be a massive mathematical error? How do

577
00:29:13,279 --> 00:29:15,480
we know there isn't just a flaw in our understanding

578
00:29:15,519 --> 00:29:17,279
of gravity on that immense scale.

579
00:29:17,400 --> 00:29:21,079
Speaker 2: It is a perfectly valid skepticism, and exactly the kind

580
00:29:21,079 --> 00:29:25,400
of rigorous questioning astrophysicists applied to this problem for decades.

581
00:29:25,920 --> 00:29:29,559
It feels counterintuitive to trust what you can't observe directly.

582
00:29:29,880 --> 00:29:31,680
Speaker 1: Right seeing is believing.

583
00:29:31,680 --> 00:29:34,559
Speaker 2: But this is where the sheer, undeniable predicted power of

584
00:29:34,599 --> 00:29:38,160
gravity becomes the ultimate truth teller. You don't need to

585
00:29:38,200 --> 00:29:41,279
see the massive object to measure the gravitational shadow at casts.

586
00:29:41,319 --> 00:29:42,240
Speaker 1: Okay, that makes sense.

587
00:29:42,680 --> 00:29:45,720
Speaker 2: We can map the precise kinetic trajectories of hundreds of

588
00:29:45,720 --> 00:29:49,039
thousands of galaxies using a phenomenon known as the kinematic

589
00:29:49,079 --> 00:29:54,200
signev Zeldovitch effect, which basically measures how galaxy clusters distort

590
00:29:54,200 --> 00:29:56,640
the cosmic microwave background as they move through it, so

591
00:29:56,680 --> 00:30:00,240
we track their weake exactly, and they're all converging on

592
00:30:00,240 --> 00:30:04,039
this point, like water circling a massive cosmic drain. Even

593
00:30:04,079 --> 00:30:07,279
though our optical telescopes are blinded by our galactic dust,

594
00:30:07,559 --> 00:30:11,599
recent observations using advanced infrared, X ray and radio telescopes,

595
00:30:11,759 --> 00:30:14,200
which have wavelengths long enough to punch through the dust

596
00:30:14,200 --> 00:30:18,119
to some degree, have revealed massive concentrations of galaxy clusters

597
00:30:18,480 --> 00:30:19,720
in that exact region.

598
00:30:19,799 --> 00:30:22,960
Speaker 1: So they finally found the culprit. They know what's pulling us, only.

599
00:30:22,759 --> 00:30:25,839
Speaker 2: Partially, and that is where the mystery deepens. They found

600
00:30:25,839 --> 00:30:28,400
the Norma cluster in that region, which contains the mass

601
00:30:28,799 --> 00:30:31,200
of tens of thousands of milky.

602
00:30:30,880 --> 00:30:32,359
Speaker 1: Ways, which sounds huge.

603
00:30:32,720 --> 00:30:36,000
Speaker 2: It is huge. But here is the terrifying mathematical truth.

604
00:30:36,480 --> 00:30:39,880
Even those mind bending masses don't fully explain the enormous

605
00:30:40,160 --> 00:30:43,880
overarching gravitational pull we are experiencing. The numbers still fall

606
00:30:43,960 --> 00:30:44,839
drastically short.

607
00:30:44,960 --> 00:30:47,720
Speaker 1: Wait, really it's not enough, not nearly enough.

608
00:30:48,440 --> 00:30:51,000
Speaker 2: The current consensus is that there is something even more

609
00:30:51,079 --> 00:30:54,559
massive lurking directly behind the Great Attractor, something we call

610
00:30:54,640 --> 00:30:59,200
the Shapley supercluster. But even then, the total gravitational dynamics

611
00:30:59,200 --> 00:31:02,119
suggest we are caught in a flow toward a structure

612
00:31:02,279 --> 00:31:06,359
so incomprehensibly large that it challenges our current models of

613
00:31:06,400 --> 00:31:09,400
how matter could even clump together in the early universe.

614
00:31:09,640 --> 00:31:13,359
Speaker 1: So we are essentially trapped in an invisible gravitational river,

615
00:31:13,480 --> 00:31:16,440
being pulled fourteen million miles an hour toward a cosmic

616
00:31:16,440 --> 00:31:19,799
rendezvous with a concentration of mass so dense we don't

617
00:31:19,839 --> 00:31:21,920
even have a complete physical.

618
00:31:21,519 --> 00:31:23,440
Speaker 2: Model for it, and we can't truly see it.

619
00:31:23,559 --> 00:31:25,720
Speaker 1: We are just helplessly falling in the dark. But let's

620
00:31:25,720 --> 00:31:29,880
shift from an incredibly massive, invisible pull to an incredibly tiny,

621
00:31:30,039 --> 00:31:34,359
invisible tear in space. Let's talk about magnetars. Because if

622
00:31:34,359 --> 00:31:37,640
the Great Attractor is a mystery of massive scale, the

623
00:31:37,640 --> 00:31:40,039
magnetar is a terror of extreme density.

624
00:31:40,160 --> 00:31:44,119
Speaker 2: In the pantheon of terrifying cosmic objects, almost nothing rifles

625
00:31:44,160 --> 00:31:48,680
the sheer incomprehensible destructive power of a magnetar. They represent

626
00:31:48,799 --> 00:31:50,519
the absolute extremes of physics.

627
00:31:50,720 --> 00:31:53,599
Speaker 1: Okay, let me try to explain what a magnetar actually is,

628
00:31:53,680 --> 00:31:56,960
and you correct my physics because reading about this felt

629
00:31:57,000 --> 00:31:57,880
like reading fantasy.

630
00:31:58,200 --> 00:31:58,759
Speaker 2: Go for it.

631
00:31:58,759 --> 00:32:01,480
Speaker 1: It starts its life as a red neutron star. Right,

632
00:32:02,079 --> 00:32:05,000
a massive star runs out of nuclear fuel, the outward

633
00:32:05,000 --> 00:32:09,200
pressure stops and gravity winds. The core collapses inwards so

634
00:32:09,559 --> 00:32:12,599
violently that the actual atomic structure fails.

635
00:32:12,799 --> 00:32:15,319
Speaker 2: Yes, the atoms themselves break.

636
00:32:15,400 --> 00:32:19,640
Speaker 1: Protons and electrons are physically crushed together to become neutrons.

637
00:32:20,160 --> 00:32:22,839
So you take a mass greater than our entire sun,

638
00:32:23,279 --> 00:32:26,680
and you compress it into a tiny, hyperdense sphere only

639
00:32:26,720 --> 00:32:28,359
about twenty kilometers.

640
00:32:27,839 --> 00:32:30,799
Speaker 2: Across the size of a small city. Right, your description

641
00:32:30,920 --> 00:32:33,759
is spot on. The density is so extreme that the

642
00:32:33,880 --> 00:32:37,440
poly exclusion principle, the quantum rule that says certain particles

643
00:32:37,480 --> 00:32:40,400
can't occupy the same state, is completely overwhelm Well.

644
00:32:40,319 --> 00:32:41,440
Speaker 1: What forces them together anyway?

645
00:32:41,519 --> 00:32:44,519
Speaker 2: Exactly? A single tea spoon of neutrons star material would

646
00:32:44,519 --> 00:32:48,200
weigh billions of tons on Earth. But a magnetar is

647
00:32:48,240 --> 00:32:51,880
a rare, extreme variation of this already extreme object.

648
00:32:51,960 --> 00:32:53,160
Speaker 1: How does it become a magnetar?

649
00:32:53,279 --> 00:32:57,880
Speaker 2: Though? During its collapse the conservation of angular momentum causes

650
00:32:57,920 --> 00:33:00,680
it to spin wildly, and for reasons we are still

651
00:33:00,720 --> 00:33:05,880
trying to fully model using megnidohydrodynamics, its magnetic field gets

652
00:33:05,960 --> 00:33:09,640
amplified to an absurd degree. We are talking about internal

653
00:33:09,680 --> 00:33:14,200
magnetic fields that are definitively the strongest in the known universe.

654
00:33:14,240 --> 00:33:18,279
How strongly talking approximately one quadrillion times more powerful than

655
00:33:18,319 --> 00:33:19,759
the Earth's magnetic field.

656
00:33:19,519 --> 00:33:22,920
Speaker 1: A quadrillion a one with fifteen zeros. The human brain

657
00:33:23,039 --> 00:33:26,440
just cannot process that number. So let's bring it down

658
00:33:26,440 --> 00:33:29,559
to a localized threat to understand the How if you

659
00:33:29,599 --> 00:33:32,559
were floating in space and a magnetar magically appeared one

660
00:33:32,599 --> 00:33:36,319
hundred thousand miles away, its magnetic field is so insane

661
00:33:36,359 --> 00:33:39,319
that it would effortlessly erase the magnetic strip off every

662
00:33:39,359 --> 00:33:42,279
single credit card on Earth instantly. But if it appeared,

663
00:33:42,359 --> 00:33:45,759
say a thousand kilometers away from you, it wouldn't just

664
00:33:45,880 --> 00:33:47,759
pull the iron out of your blood like a comic

665
00:33:47,799 --> 00:33:51,240
book villain. It physically alters chemistry at the atomic level.

666
00:33:51,559 --> 00:33:54,359
How does a magnetic field dissolve to human being?

667
00:33:54,519 --> 00:33:56,680
Speaker 2: It alters the fundamental geometry of atoms.

668
00:33:56,720 --> 00:33:57,559
Speaker 1: The geometry.

669
00:33:57,799 --> 00:34:02,200
Speaker 2: Yes, in a normal environment, the magnetic force is negligible

670
00:34:02,480 --> 00:34:06,960
compared to the electric force holding atoms together. Electrons circlocomic

671
00:34:07,039 --> 00:34:12,239
nuclei in these relatively stable, spherical or dumbbell shaped clouds.

672
00:34:12,119 --> 00:34:14,440
Speaker 1: Right like the diagrams in a chemistry.

673
00:34:14,000 --> 00:34:18,079
Speaker 2: Textbook, precisely, But the magnetic force of a magnetar is

674
00:34:18,159 --> 00:34:22,920
so overwhelmingly intense that it physically dominates the electric force

675
00:34:23,440 --> 00:34:27,480
it stretches those electron orbits. Instead of spherical clouds, the

676
00:34:27,519 --> 00:34:31,960
electrons are stretched into long, instantly thin needles, perfectly aligned

677
00:34:32,000 --> 00:34:33,320
with the magnetic field lines.

678
00:34:33,400 --> 00:34:36,719
Speaker 1: And because chemistry is entirely dictated by how electron clouds

679
00:34:36,760 --> 00:34:38,880
interact and bond, exactly.

680
00:34:38,559 --> 00:34:43,239
Speaker 2: Normal chemical bonds become mathematically impossible. The complex organic molecules

681
00:34:43,239 --> 00:34:45,800
that make up your DNA, your proteins, your cell walls,

682
00:34:45,920 --> 00:34:47,119
they simply cannot hold together.

683
00:34:47,239 --> 00:34:47,960
Speaker 1: The just fall apart.

684
00:34:48,079 --> 00:34:51,519
Speaker 2: It would physically tear apart your biological body atom by atom,

685
00:34:51,719 --> 00:34:54,440
violently wrenching the electrons into these new shapes. It would

686
00:34:54,480 --> 00:34:58,960
cause instantaneous, complete tissue dissolution that is horrifying. You wouldn't

687
00:34:59,000 --> 00:35:02,639
burn or freeze, you would literally dissolve into subatomic dust,

688
00:35:02,960 --> 00:35:05,559
simply because the rules of chemistry were suspended in that

689
00:35:05,679 --> 00:35:06,599
localized space.

690
00:35:06,760 --> 00:35:09,440
Speaker 1: And we've actually felt their wrath from afar haven't we.

691
00:35:09,639 --> 00:35:12,559
The two thousand and four event completely blew my mind

692
00:35:12,559 --> 00:35:13,360
when I read about it.

693
00:35:13,480 --> 00:35:17,599
Speaker 2: On December twenty seventh, two thousand and four, terrified astrophysicists

694
00:35:18,039 --> 00:35:22,280
recorded the direct physical effects of a massive magnetar eruption.

695
00:35:22,519 --> 00:35:26,400
An object known as SGR eighteen oh six twenty, located

696
00:35:26,440 --> 00:35:29,719
an incredible fifty thousand light years away on the exact

697
00:35:29,800 --> 00:35:33,079
opposite side of our Milky Way galaxy, released a blinding

698
00:35:33,119 --> 00:35:34,239
burst of energy.

699
00:35:34,000 --> 00:35:36,840
Speaker 1: Fifty thousand light years. That's across the whole galaxy it is.

700
00:35:37,159 --> 00:35:40,400
Speaker 2: Yet even from that staggering distance, it briefly outshone the

701
00:35:40,440 --> 00:35:44,360
full moon and gamma rays and measurably ionized the earth'supper atmosphere.

702
00:35:44,480 --> 00:35:47,239
Speaker 1: Let that sink in for everyone listening. An object fifty

703
00:35:47,280 --> 00:35:49,760
thousand light years away physically altered.

704
00:35:49,440 --> 00:35:51,559
Speaker 2: Our atmosphere in just a tenth of a second. That

705
00:35:51,719 --> 00:35:54,920
single burst released more raw energy than our Sun produces

706
00:35:54,960 --> 00:35:56,280
in one hundred thousand years.

707
00:35:56,400 --> 00:35:57,000
Speaker 1: Unbelievable.

708
00:35:57,000 --> 00:36:01,199
Speaker 2: The terrifying realization followed. Had this the exact event occurred

709
00:36:01,360 --> 00:36:04,280
just ten light years from Earth, which is right next

710
00:36:04,320 --> 00:36:08,119
door in cosmic terms, the gamma radiation would have instantly

711
00:36:08,480 --> 00:36:09,880
completely stripped our.

712
00:36:09,760 --> 00:36:13,559
Speaker 1: Ozone layer, triggering the exact cascade of ecological collapse and

713
00:36:13,639 --> 00:36:15,519
mass extinction we discussed earlier.

714
00:36:15,320 --> 00:36:19,440
Speaker 2: Exactly, and what makes magnetars fundamentally more terrifying than black

715
00:36:19,440 --> 00:36:25,280
holes is their utter unpredictability. Their unfathomably powerful magnetic fields

716
00:36:25,280 --> 00:36:30,599
create immense twisting internal strain. Eventually, the solid, hyperdense crust

717
00:36:30,599 --> 00:36:33,320
of the neutron star physically snaps and fractures under the

718
00:36:33,320 --> 00:36:34,079
magnetic tension.

719
00:36:34,239 --> 00:36:34,719
Speaker 1: Starquake.

720
00:36:34,840 --> 00:36:38,480
Speaker 2: Precisely, and just like earthquakes on Earth, these starquakes are

721
00:36:38,480 --> 00:36:42,679
completely random and currently impossible to predict. When the crust fractures,

722
00:36:42,840 --> 00:36:45,840
it produces these eruptive bursts of concentrated gamma rays and

723
00:36:45,960 --> 00:36:48,000
X rays that sterilize surrounding space.

724
00:36:48,199 --> 00:36:49,559
Speaker 1: Do we know how many are out there?

725
00:36:49,679 --> 00:36:53,199
Speaker 2: There are about thirty positively identified magnetars lurking in the

726
00:36:53,199 --> 00:36:57,000
Milky Way, but countless more likely remain undetected due to

727
00:36:57,039 --> 00:37:01,639
their long periods of sporadic quiet activity. They're essentially invisible

728
00:37:02,000 --> 00:37:05,320
loaded cosmic shotguns with hair triggers, just waiting for the

729
00:37:05,360 --> 00:37:06,599
magnetic tension to snap.

730
00:37:06,960 --> 00:37:10,880
Speaker 1: So if a magnetar is a localized, unpredictable shotgun, blast

731
00:37:11,360 --> 00:37:15,840
quasars and gamma ray bursts are the universe's intergalactic sniper rifles.

732
00:37:16,159 --> 00:37:19,000
They strike from halfway across the universe. Let's look at

733
00:37:19,039 --> 00:37:22,000
quasar as first, because the history of their discovery is fascinating.

734
00:37:22,400 --> 00:37:24,840
It dates back to nineteen sixty three with an astronomer

735
00:37:24,880 --> 00:37:25,880
named Martin Schmidt.

736
00:37:26,000 --> 00:37:29,559
Speaker 2: Martin Schmidt's discovery fundamentally changed our understanding of cosmic violence

737
00:37:29,559 --> 00:37:32,000
and the sheer scale of energy the universe can produce.

738
00:37:32,480 --> 00:37:35,119
He was carefully analyzing the light spectrum of what appeared

739
00:37:35,119 --> 00:37:39,000
to be just a faint, blue, somewhat unusual star designated

740
00:37:39,079 --> 00:37:40,400
as three C two seventy three.

741
00:37:40,639 --> 00:37:43,000
Speaker 1: Just looked like a normal star, it did, but.

742
00:37:42,960 --> 00:37:44,639
Speaker 2: As he looked at the red shift of its light,

743
00:37:45,079 --> 00:37:48,559
he realized he was observing something far more extreme. It

744
00:37:48,639 --> 00:37:50,639
wasn't a star in our galaxy at all. It was

745
00:37:50,679 --> 00:37:53,519
an object located billions of light years away, yet it

746
00:37:53,599 --> 00:37:56,800
was so insanely luminous that it completely outshined its entire

747
00:37:56,840 --> 00:37:58,159
host galaxy.

748
00:37:57,960 --> 00:38:01,119
Speaker 1: Billions of light years away, but outshining a galaxy, and the.

749
00:38:01,159 --> 00:38:03,960
Speaker 2: Light was fluctuating rapidly, which meant the source had to

750
00:38:04,000 --> 00:38:07,559
be physically small, originating from a region smaller than our

751
00:38:07,599 --> 00:38:08,920
own solar system.

752
00:38:08,719 --> 00:38:10,960
Speaker 1: A region the size of a solar system outshining an

753
00:38:11,079 --> 00:38:15,199
entire galaxy of hundreds of billions of stars. I mean,

754
00:38:15,239 --> 00:38:17,440
if I were an astronomer in the sixties, I would

755
00:38:17,440 --> 00:38:21,320
assume my equipment was just broken. It sounds physically impossible.

756
00:38:21,000 --> 00:38:24,960
Speaker 2: And many scientists believed it was broken. He had identified

757
00:38:24,960 --> 00:38:29,079
the first quasar short for quasi stellar radio source. Today,

758
00:38:29,400 --> 00:38:33,800
our astrophysical models have solved the mystery. To put it bluntly,

759
00:38:34,280 --> 00:38:37,360
quasars are active super massive black holes.

760
00:38:37,440 --> 00:38:38,840
Speaker 1: But black holes don't emit light.

761
00:38:39,079 --> 00:38:42,039
Speaker 2: We know black holes themselves emit no light. But quasars

762
00:38:42,039 --> 00:38:44,760
are powered by black holes with masses billions of times

763
00:38:44,800 --> 00:38:48,599
greater than our Sun, which are actively violently devouring immense

764
00:38:48,599 --> 00:38:49,719
amounts of surrounding matter.

765
00:38:49,840 --> 00:38:52,960
Speaker 1: And as that matter, massive clouds of gas, dust, and

766
00:38:53,000 --> 00:38:56,440
totally torn apart stars spirals down to the gravity well.

767
00:38:56,480 --> 00:38:59,960
It creates an enormous cosmic traffic jam right and accretion discs.

768
00:39:00,079 --> 00:39:01,079
Speaker 2: Yes, the accretion disk.

769
00:39:01,320 --> 00:39:04,199
Speaker 1: The material in that disc is crammed together so tightly

770
00:39:04,280 --> 00:39:07,639
and moving at such high relativistic velocities that the sheer

771
00:39:07,719 --> 00:39:11,360
physical friction heats it to millions of degrees. The glow

772
00:39:11,360 --> 00:39:14,119
from that friction releases staggering amounts of energy across the

773
00:39:14,239 --> 00:39:19,079
entire electromagnetic spectrum. But the true danger the sniper rifle

774
00:39:19,119 --> 00:39:22,840
aspect isn't just the glow. It's the jets you're touching.

775
00:39:22,840 --> 00:39:26,760
Speaker 2: On the most lethal mechanism of Aquasar, the immense twisting

776
00:39:26,840 --> 00:39:30,079
magnetic fields surrounding the spinning black hole can take a

777
00:39:30,119 --> 00:39:33,840
portion of that superheated infalling matter and channel.

778
00:39:33,480 --> 00:39:35,719
Speaker 1: It outward, basically shooting it away.

779
00:39:35,599 --> 00:39:39,679
Speaker 2: Yes, launching hyperfocused beams of lethal radiation and subatomic particles

780
00:39:39,719 --> 00:39:43,159
accelerated to near the speed of light. These colossal, relativistic

781
00:39:43,239 --> 00:39:47,239
jets extend outward across millions of light years millions. For example,

782
00:39:47,400 --> 00:39:50,440
observations of the quasar pks zero sixty seven seventy five

783
00:39:50,480 --> 00:39:54,079
to two reveal a continuous lethal jet extending over one

784
00:39:54,079 --> 00:39:57,199
point five million light years in length. That single beam

785
00:39:57,239 --> 00:40:00,320
of energy is an incredible five times longer than the

786
00:40:00,480 --> 00:40:03,440
entire Milky Way galaxy. If a planet, or even an

787
00:40:03,599 --> 00:40:06,280
entire galaxy happens to lie directly in the path of

788
00:40:06,320 --> 00:40:10,039
that highly colimated beam, its atmosphere is boiled away and

789
00:40:10,079 --> 00:40:12,000
its surface is completely sterilized.

790
00:40:12,159 --> 00:40:14,840
Speaker 1: So here is the chilling hypothetical this raises for me.

791
00:40:15,400 --> 00:40:19,039
We know there is a supermassive black hole sitting quietly

792
00:40:19,119 --> 00:40:22,039
at the center of our milky way, Sagittarius a star.

793
00:40:22,480 --> 00:40:26,039
It's dormant right now, it's just fasting, occasionally snacking on

794
00:40:26,079 --> 00:40:29,000
a stray asteroid or a small gas cloud. But what

795
00:40:29,079 --> 00:40:32,360
happens if it suddenly encounters a rich source of fuel.

796
00:40:32,159 --> 00:40:33,880
Speaker 2: Like a massive star cluster falling in.

797
00:40:34,000 --> 00:40:37,199
Speaker 1: Exactly say, a massive dense cloud of gas falls into

798
00:40:37,239 --> 00:40:40,320
its gravity well, and it violently awakens as a quasar.

799
00:40:41,000 --> 00:40:42,760
Would Earth happen to lie in the path of a

800
00:40:42,840 --> 00:40:46,079
sterilization jets? Or would we just get a terrifying front

801
00:40:46,159 --> 00:40:49,039
row seat as a brilliant new cosmic beacon ignited in

802
00:40:49,079 --> 00:40:51,679
our sky right before the ambient radiation cooked us.

803
00:40:52,039 --> 00:40:56,039
Speaker 2: It is a profound existential question. Thankfully, our current measurements

804
00:40:56,039 --> 00:40:59,559
of the orientation of Sagittarius a star spin axis suggest

805
00:40:59,599 --> 00:41:01,679
that if it to produce jets, they would likely point

806
00:41:01,760 --> 00:41:04,079
up and out perpendicular to the galactic plane.

807
00:41:04,159 --> 00:41:06,159
Speaker 1: Okay, so it would shoot out the top and bottom,

808
00:41:06,239 --> 00:41:09,400
not directly sweeping through the disc where our solar system resides.

809
00:41:09,639 --> 00:41:13,920
Speaker 2: Right. However, even without a direct jet strike. This sheer

810
00:41:14,079 --> 00:41:17,760
volume of ambient high energy X ray and UV radiation

811
00:41:18,400 --> 00:41:21,800
flooding the galaxy from an active galactic nucleus right in

812
00:41:21,840 --> 00:41:25,639
our own backyard, that would heavily disrupt the protective layers

813
00:41:25,639 --> 00:41:28,199
of our atmosphere, severely stressing the biosphere.

814
00:41:28,199 --> 00:41:31,119
Speaker 1: So we'd still be in huge trouble. And if quasars

815
00:41:31,159 --> 00:41:34,360
are the sustained sniper fire of the universe, gamma ray

816
00:41:34,400 --> 00:41:37,599
bursts or GRBs are the flash bangrenades that can kill

817
00:41:37,599 --> 00:41:40,519
you from across the cosmos. I loved reading about how

818
00:41:40,559 --> 00:41:42,840
these were discovered because it was born entirely out of

819
00:41:42,880 --> 00:41:44,639
Cold War paranoia, not astronomy.

820
00:41:44,719 --> 00:41:47,280
Speaker 2: It is one of the great ironies of science. In

821
00:41:47,320 --> 00:41:50,719
the late nineteen sixties, the United States launched the Villa satellites.

822
00:41:51,280 --> 00:41:55,000
Their explicit, highly classified purpose was to monitor the Earth

823
00:41:55,039 --> 00:41:57,880
for the telltale flash of gamma radiation that would indicate

824
00:41:58,199 --> 00:42:00,920
illegal Soviet nuclear weapons tests occurring in.

825
00:42:00,880 --> 00:42:04,079
Speaker 1: Space, trying to catch them violating the Nuclear Test.

826
00:42:03,840 --> 00:42:06,360
Speaker 2: Ban Treaty exactly, or testing the upper atmosphere.

827
00:42:06,360 --> 00:42:08,719
Speaker 1: But instead of picking up Soviet nukes, the alarms went

828
00:42:08,760 --> 00:42:09,480
off from deep.

829
00:42:09,320 --> 00:42:14,119
Speaker 2: Space they did. They began picking up massive, mysterious incredibly

830
00:42:14,159 --> 00:42:18,559
brief bursts of intense gamma radiation coming from random directions

831
00:42:18,559 --> 00:42:19,639
in the deep cosmos.

832
00:42:19,679 --> 00:42:21,119
Speaker 1: They must have been so confused.

833
00:42:21,239 --> 00:42:23,719
Speaker 2: Once ronomers realized what they were looking at, it changed

834
00:42:23,760 --> 00:42:27,800
the field forever. These terrifying events represent the absolute most

835
00:42:27,880 --> 00:42:30,679
violent and energetic explosions in the universe since the Big

836
00:42:30,719 --> 00:42:34,760
Bang itself. A typical GRB releases more raw energy in

837
00:42:34,760 --> 00:42:37,440
a span of just a few seconds than our entire

838
00:42:37,480 --> 00:42:41,000
Sun will produce throughout its entire ten billion year lifetime.

839
00:42:41,159 --> 00:42:44,639
Speaker 1: Just process that scale for a second, ten billion years

840
00:42:44,639 --> 00:42:49,519
of continuous solar output concentrated into three seconds. What physical

841
00:42:49,559 --> 00:42:53,039
mechanism is actually capable of causing an explosion that.

842
00:42:53,119 --> 00:42:55,719
Speaker 2: Big We finally confirmed the sources in the late nineteen

843
00:42:55,800 --> 00:42:58,599
nineties and early two thousands. Ye GRBs essentially marked the

844
00:42:58,679 --> 00:43:00,559
violent birth cries of new black.

845
00:43:00,480 --> 00:43:02,360
Speaker 1: Birth cries that's poetic and terrifying.

846
00:43:02,559 --> 00:43:06,320
Speaker 2: They occur under two extreme circumstances. Either when a truly

847
00:43:06,400 --> 00:43:10,119
massive star a hypergiant, completely exhausts its fuel and its

848
00:43:10,119 --> 00:43:12,679
core collapses in on itself to form a black hole,

849
00:43:12,719 --> 00:43:17,239
triggering a hypernova, or when two ultra dense neutron stars

850
00:43:17,440 --> 00:43:21,440
locked in a binary orbit gradually spiral inward and violently

851
00:43:21,440 --> 00:43:25,440
collide emerge. In both scenarios, the sheer energy released is

852
00:43:25,480 --> 00:43:28,960
so extreme and the magnetic fields channel the explosion so

853
00:43:29,119 --> 00:43:33,079
tightly into two opposing beams that for a few brief moments,

854
00:43:33,280 --> 00:43:36,840
the explosion literally outshines the rest of the visible universe.

855
00:43:36,840 --> 00:43:40,880
Speaker 1: Combined outshines the entire universe, and their sterilizing power is

856
00:43:40,960 --> 00:43:44,800
completely unmatched. The data indicates that an intense beam of

857
00:43:44,840 --> 00:43:48,480
gamma radiation from a burst aim directly at Earth, even

858
00:43:48,480 --> 00:43:51,239
from a staggering distance of three thousand light years away,

859
00:43:51,440 --> 00:43:54,039
would effortlessly destroy our ozone.

860
00:43:53,679 --> 00:43:54,599
Speaker 2: Layer without a doubt.

861
00:43:54,639 --> 00:43:57,280
Speaker 1: It would trigger the exact mass extinction cycle we talked

862
00:43:57,280 --> 00:43:59,440
about with the galactic midplane, but it would happen in.

863
00:43:59,440 --> 00:44:01,960
Speaker 2: An instant, and we know definitively they can reach much

864
00:44:02,000 --> 00:44:05,599
further and still cause massive disruption. In October twenty twenty two,

865
00:44:05,679 --> 00:44:09,159
astronomers detected GRB twenty two one oh nine, a aptly

866
00:44:09,239 --> 00:44:11,639
nicknamed the boat the brightest of all time.

867
00:44:11,840 --> 00:44:12,920
Speaker 1: The boat nice.

868
00:44:13,119 --> 00:44:17,199
Speaker 2: It originated an incredible two point four billion light years away.

869
00:44:18,159 --> 00:44:20,400
It is one of the most distant objects we can observe.

870
00:44:21,000 --> 00:44:24,079
Yet as that wave of gamma rays washed over Earth.

871
00:44:24,440 --> 00:44:28,320
It was so intense that it measurably disrupted our upper ionosphere,

872
00:44:28,719 --> 00:44:31,920
interfering with long wave radio transmissions from.

873
00:44:31,840 --> 00:44:34,239
Speaker 1: Two point four billion light years away. I mean, if

874
00:44:34,239 --> 00:44:37,039
that exact event had happened anywhere within our own galaxy,

875
00:44:37,079 --> 00:44:40,599
it would have been an immediate, unstoppable catastrophe. And what

876
00:44:40,679 --> 00:44:43,920
makes grb's the ultimate terror is that they are completely random.

877
00:44:43,960 --> 00:44:47,639
There's no warning system possible, none whatsoever. Because the deadly

878
00:44:47,679 --> 00:44:50,559
beam of gamma radiation is traveling at the exact speed

879
00:44:50,599 --> 00:44:53,079
of light, you wouldn't see it coming until it was

880
00:44:53,159 --> 00:44:56,840
already burning the atmosphere. The light carrying the image of

881
00:44:56,840 --> 00:44:59,559
the explosion arrives at the exact same instant as the

882
00:44:59,639 --> 00:45:01,119
lethal radiation itself.

883
00:45:01,280 --> 00:45:04,280
Speaker 2: They are the ultimate cosmic random number generators for life

884
00:45:04,280 --> 00:45:08,039
and death. And there is strong paleontological evidence proposed by

885
00:45:08,159 --> 00:45:11,760
numerous respected scientists that a GRB may have already struck

886
00:45:11,800 --> 00:45:12,800
Earth in the deep past.

887
00:45:12,880 --> 00:45:14,159
Speaker 1: Wait really, when.

888
00:45:14,119 --> 00:45:17,639
Speaker 2: The ordivision extinction event, which brutally wiped out eighty five

889
00:45:17,679 --> 00:45:20,280
percent of all marine species about four hundred and forty

890
00:45:20,320 --> 00:45:24,039
million years ago, perfectly matches the exact physical profile of

891
00:45:24,079 --> 00:45:28,679
a GRB strike. The fossil record shows a sudden, massive

892
00:45:28,719 --> 00:45:32,159
depletion of ozone leading to fatal UV exposure for surface

893
00:45:32,199 --> 00:45:36,679
dwelling plankton, followed by a rapid, intense, unexplained global ice age.

894
00:45:36,880 --> 00:45:41,119
Speaker 1: Wow. It raises a profoundly troubling possibility for the search

895
00:45:41,159 --> 00:45:46,280
for extraterrestrial life. Perhaps the universe periodically and randomly sterilizes

896
00:45:46,360 --> 00:45:50,480
habitable worlds through these unpredictable bursts. It brutally resets the

897
00:45:50,519 --> 00:45:55,119
clock on biological evolution across entire galactic neighborhoods, often right

898
00:45:55,239 --> 00:45:57,119
when intelligence is about to emerge.

899
00:45:57,199 --> 00:45:58,480
Speaker 2: It's a very plausible filter.

900
00:45:58,599 --> 00:46:00,760
Speaker 1: But as we look at the final phenomena on our sources,

901
00:46:00,760 --> 00:46:03,519
I need to pause and draw a crucial distinction everything

902
00:46:03,559 --> 00:46:08,719
we've discussed so far. You know, superflarers, galact cannibalism, magnetars, quahasars, GRBs.

903
00:46:08,920 --> 00:46:12,119
All of these terrifying events destroy matter right physical objects,

904
00:46:12,119 --> 00:46:15,199
They destroy planets, they destroy stars, they dissolve biology. But

905
00:46:15,280 --> 00:46:17,519
there are two final events we need to unravel that

906
00:46:17,559 --> 00:46:20,880
don't just destroy matter. They destroy the actual fundamental fabric

907
00:46:20,880 --> 00:46:21,960
of reality itself.

908
00:46:22,320 --> 00:46:29,039
Speaker 2: We are moving from localized physical destruction to fundamental universal

909
00:46:29,119 --> 00:46:33,800
unmaking and the first of these reality ending scenarios is

910
00:46:33,840 --> 00:46:37,679
known as the Big Rip, driven by the profound mystery

911
00:46:37,719 --> 00:46:38,599
of dark energy.

912
00:46:39,039 --> 00:46:41,280
Speaker 1: Let's set the stage for how this was discovered, because

913
00:46:41,280 --> 00:46:44,280
it was a total shock to the scientific community. In

914
00:46:44,400 --> 00:46:47,000
nineteen ninety eight, astronomers were doing what they always do,

915
00:46:47,280 --> 00:46:49,920
measuring things. They were looking at the red shift of

916
00:46:50,079 --> 00:46:54,760
very specific distant supernovae to measure exactly how much the

917
00:46:54,880 --> 00:46:58,079
universe's expansion was slowing down, because they assumed it had

918
00:46:58,119 --> 00:47:00,679
to be slowing down, right, because simple logic dictates that

919
00:47:00,719 --> 00:47:03,960
after the Big Bang, through everything outward, the immense collective

920
00:47:04,000 --> 00:47:07,239
gravity of all the billions of galaxies should be pulling

921
00:47:07,400 --> 00:47:10,559
everything back in, slowing the expansion like a ball rolling

922
00:47:10,639 --> 00:47:11,320
up a steep hill.

923
00:47:11,519 --> 00:47:15,719
Speaker 2: That was the foundational assumption cosmology for decades. But instead,

924
00:47:15,920 --> 00:47:20,679
two independent teams measuring these supernovae found something mathematically impossible

925
00:47:20,760 --> 00:47:21,800
under the old models.

926
00:47:21,960 --> 00:47:23,239
Speaker 1: The ball wasn't slowing down.

927
00:47:23,480 --> 00:47:26,519
Speaker 2: The expansion wasn't slowing down at all. It was accelerating.

928
00:47:26,840 --> 00:47:29,599
Galaxies were flying away from each other faster and faster

929
00:47:29,679 --> 00:47:33,880
every day. Some completely unknown invisible force, which we now

930
00:47:33,920 --> 00:47:37,599
famously call dark energy, was aggressively pushing the universe apart

931
00:47:37,639 --> 00:47:39,239
with ever increasing strength.

932
00:47:39,119 --> 00:47:43,000
Speaker 1: And it's not some fringe mathematical anomaly. Calculations showed dark

933
00:47:43,119 --> 00:47:46,280
energy makes up roughly sixty eight percent of the entire universe.

934
00:47:46,840 --> 00:47:50,559
It is the overwhelmingly dominant component of reality itself, and

935
00:47:50,599 --> 00:47:53,880
we have absolutely no idea what it actually physically is.

936
00:47:54,440 --> 00:47:57,719
Speaker 2: That is the most unnerving part. We genuinely don't have

937
00:47:57,760 --> 00:48:00,960
a complete mathematical model for its origin. We only know

938
00:48:01,039 --> 00:48:05,840
how it behaves. Most standard cosmological models treat dark energy

939
00:48:05,880 --> 00:48:07,400
as a cosmological constant.

940
00:48:07,519 --> 00:48:08,239
Speaker 1: What does that mean?

941
00:48:08,519 --> 00:48:12,199
Speaker 2: Practically a steady, unchanging inherent pressure of empty space that

942
00:48:12,280 --> 00:48:16,280
simply stretches the fabric of reality at a predictable rate forever.

943
00:48:16,800 --> 00:48:19,400
In that scenario, the universe would just slowly cool down,

944
00:48:19,519 --> 00:48:22,880
galaxies would drift beyond the observable horizon, and everything will

945
00:48:23,000 --> 00:48:23,920
quietly dim into a.

946
00:48:23,840 --> 00:48:26,320
Speaker 1: Big freeze, which is sad but peaceful.

947
00:48:26,599 --> 00:48:31,039
Speaker 2: But there are terrifying theoretical models based on variations of

948
00:48:31,119 --> 00:48:35,880
dark energy's equation of state. Specifically, if dark energy behaves

949
00:48:35,920 --> 00:48:37,440
as something called phantom energy.

950
00:48:37,559 --> 00:48:40,360
Speaker 1: Okay, I want to understand the physics of phantom energy,

951
00:48:40,480 --> 00:48:43,360
because what makes it so terrifying? How is it different

952
00:48:43,360 --> 00:48:44,960
from a cosmological constant.

953
00:48:45,320 --> 00:48:48,360
Speaker 2: If dark energy is phantom energy, it isn't just a

954
00:48:48,440 --> 00:48:52,559
constant steady pressure. Its equation of state dictates that its

955
00:48:52,559 --> 00:48:55,480
density actually increases as space expands.

956
00:48:55,599 --> 00:48:57,360
Speaker 1: Wait, it gets stronger as it gets bigger.

957
00:48:57,480 --> 00:49:00,960
Speaker 2: Yes, it creates an ever escalating run away feedback loop.

958
00:49:01,440 --> 00:49:04,400
As space expands, more phantom energy is created out of

959
00:49:04,400 --> 00:49:08,400
the vacuum, which causes space to expand faster, which creates

960
00:49:08,440 --> 00:49:12,199
even more fandom energy. It accelerates the universe's expansion at

961
00:49:12,199 --> 00:49:14,960
an exponential, violently compounding rate.

962
00:49:15,119 --> 00:49:15,559
Speaker 1: Wow.

963
00:49:15,800 --> 00:49:19,039
Speaker 2: And if this phantom energy truly exists, it leads absolutely

964
00:49:19,079 --> 00:49:22,599
inevitably to a violent universe ending conclusion known as the

965
00:49:22,599 --> 00:49:23,119
Big Rip.

966
00:49:23,280 --> 00:49:24,960
Speaker 1: I have an analogy for this. Tell me if this

967
00:49:25,000 --> 00:49:27,159
tracks with the math. Visualize the universe as a flat

968
00:49:27,280 --> 00:49:29,159
rubber band and you've drawn a picture of a solar

969
00:49:29,159 --> 00:49:30,079
system on it with a pen.

970
00:49:30,239 --> 00:49:31,800
Speaker 2: Okay, I'm visualizing.

971
00:49:31,239 --> 00:49:34,920
Speaker 1: It in the standard cosmological constant model. You just stretch

972
00:49:34,960 --> 00:49:38,559
the rubber bands slowly. The solar system gets further away

973
00:49:38,559 --> 00:49:41,119
from other drawings on the band, but the ink drawing

974
00:49:41,199 --> 00:49:44,639
of the solar system itself stays intact. The gravity holds

975
00:49:44,679 --> 00:49:45,079
it together.

976
00:49:45,199 --> 00:49:47,880
Speaker 2: Right. The local gravity overpowers the slow stretching.

977
00:49:48,039 --> 00:49:51,199
Speaker 1: But in the phantom energy model, you don't just stretch it.

978
00:49:51,639 --> 00:49:54,280
You grab it with heavy pliers and rip it apart

979
00:49:54,360 --> 00:49:58,719
with furiously compounding force, stretching the rubber so violently that

980
00:49:58,760 --> 00:50:01,440
the ink drawing itself is distorted and torn apart.

981
00:50:01,719 --> 00:50:04,719
Speaker 2: That is an excellent way to visualize the progression of forces.

982
00:50:05,360 --> 00:50:09,360
Under the big rip scenario, the repulsive force of phantom

983
00:50:09,440 --> 00:50:14,639
energy tearing space apart, becomes so overwhelmingly powerful that it systematically,

984
00:50:14,760 --> 00:50:19,119
effortlessly overcomes every other fundamental force in nature, working its

985
00:50:19,119 --> 00:50:20,559
way down the scale of physics.

986
00:50:20,679 --> 00:50:22,679
Speaker 1: So it starts big first.

987
00:50:22,800 --> 00:50:26,519
Speaker 2: The swelling dark energy will overcome the massive gravitational bounds

988
00:50:26,559 --> 00:50:30,840
holding superclusters of galaxies together. Galaxies will be scattered permanently

989
00:50:30,880 --> 00:50:33,800
across an ever expanding, lonely void, so.

990
00:50:33,760 --> 00:50:36,519
Speaker 1: The night sky goes completely black. You wouldn't be able

991
00:50:36,559 --> 00:50:39,000
to see any other galaxies completely black.

992
00:50:39,920 --> 00:50:43,079
Speaker 2: But it doesn't stop there. As the dark energy pressure

993
00:50:43,119 --> 00:50:47,320
mounts further, it will physically tear apart individual galaxies themselves.

994
00:50:48,199 --> 00:50:52,039
The gravity holding the Milky Way together will fail, violently,

995
00:50:52,119 --> 00:50:55,280
flinging stars into the freezing isolation of deep space.

996
00:50:55,559 --> 00:50:56,760
Speaker 1: Then the solar systems.

997
00:50:57,159 --> 00:51:01,679
Speaker 2: Yes, As the acceleration intensifies further still, individual solar systems

998
00:51:01,719 --> 00:51:05,360
will be ruthlessly ripped apart. The Sun's gravity will no

999
00:51:05,440 --> 00:51:08,199
longer be able to hold onto the Earth planets are

1000
00:51:08,199 --> 00:51:10,000
forcefully flung away into the dark.

1001
00:51:10,280 --> 00:51:12,440
Speaker 1: But the terror is that it eventually reaches down to

1002
00:51:12,519 --> 00:51:14,920
the micro level. It overcomes electromagnetism.

1003
00:51:15,079 --> 00:51:17,920
Speaker 2: Right, Yes, Eventually the expansion of the very fabric of

1004
00:51:17,960 --> 00:51:21,760
space becomes so insanely violent and rapid that it overcomes

1005
00:51:21,800 --> 00:51:26,000
the electromagnetic forces that bind molecules together. Everything, mountains, oceans,

1006
00:51:26,079 --> 00:51:30,960
human structures, living organisms will simply disintegrate into their constituent atoms.

1007
00:51:30,559 --> 00:51:33,159
Speaker 1: Because the space between the atoms is swelling too fast

1008
00:51:33,199 --> 00:51:35,599
for them to share electrons. Exactly, And what is the

1009
00:51:35,639 --> 00:51:36,880
final act of the big rip.

1010
00:51:37,119 --> 00:51:40,880
Speaker 2: In the final unimaginable fraction of a second, right before

1011
00:51:40,920 --> 00:51:44,880
the absolute end of time, the very fabric of space

1012
00:51:44,960 --> 00:51:49,000
expands so violently that atomic nuclei themselves are torn apart.

1013
00:51:49,599 --> 00:51:52,039
The strong nuclear force is overwhelmed.

1014
00:51:51,639 --> 00:51:52,800
Speaker 1: The strongest force we know of.

1015
00:51:53,000 --> 00:51:57,639
Speaker 2: It fails. Protons and neutrons physically separate, and then an

1016
00:51:57,679 --> 00:52:00,440
instant later, the quarks that make up the pros and

1017
00:52:00,480 --> 00:52:04,599
neutrons split from one another. Even the fundamental indivisible particles

1018
00:52:04,599 --> 00:52:07,400
that make up all matter will simply cease to exist

1019
00:52:07,480 --> 00:52:10,800
as coherent entities. Just poof everything that has ever existed

1020
00:52:10,840 --> 00:52:13,159
in the history of the cosmos will be reduced to

1021
00:52:13,199 --> 00:52:17,280
an infinitely expanding cloud of sub atomic debris scattered across

1022
00:52:17,320 --> 00:52:19,559
a space that is growing faster than the speed of light.

1023
00:52:19,840 --> 00:52:22,840
Speaker 1: The ultimate disintegration of matter, and the timeline on this

1024
00:52:22,960 --> 00:52:25,800
is deeply unsettling. I always assumes universe ending stuff was

1025
00:52:26,199 --> 00:52:29,360
trillions of years away, you know, an abstract concept for

1026
00:52:29,360 --> 00:52:30,159
the distant future.

1027
00:52:30,280 --> 00:52:31,199
Speaker 2: Not under this model.

1028
00:52:31,440 --> 00:52:35,400
Speaker 1: No extreme phantom energy models predict the Big Rip could

1029
00:52:35,400 --> 00:52:39,039
occur in as little as twenty two billion years. Since

1030
00:52:39,079 --> 00:52:42,760
the universe is already roughly thirteen point eight billion years old,

1031
00:52:43,159 --> 00:52:45,719
that means we might already be past the midpoint of

1032
00:52:45,760 --> 00:52:49,760
existence itself. We are unknowingly living in a cosmos that

1033
00:52:49,800 --> 00:52:53,280
has already past its midlife crisis, dominated by the very

1034
00:52:53,360 --> 00:52:55,639
force that will eventually tear apart reality.

1035
00:52:55,880 --> 00:52:58,840
Speaker 2: It puts our entire history into a very compressed perspective.

1036
00:52:58,880 --> 00:53:01,920
Speaker 1: It really does. The Big Rip takes billions of years

1037
00:53:01,920 --> 00:53:05,360
to slowly unfold The number one threat on our list.

1038
00:53:05,679 --> 00:53:09,079
The ultimate cosmic terror could happen. Before I finish the sentence.

1039
00:53:09,119 --> 00:53:09,920
Speaker 2: It absolutely could.

1040
00:53:10,000 --> 00:53:12,960
Speaker 1: Let's talk about false vacuum decay, because the big rip

1041
00:53:13,039 --> 00:53:16,440
destroys matter by pulling it apart over eons. But false

1042
00:53:16,480 --> 00:53:20,440
vacuum decay doesn't just destroy matter. It instantly violently destroys

1043
00:53:20,440 --> 00:53:22,480
the mathematical laws of physics themselves.

1044
00:53:22,639 --> 00:53:24,800
Speaker 2: To understand false vacuum decay, we have to dive into

1045
00:53:24,800 --> 00:53:28,440
the core of modern quantum field theory. According to this theory,

1046
00:53:28,679 --> 00:53:32,320
what we perceive as empty space isn't actually empty. It

1047
00:53:32,400 --> 00:53:36,239
is permeated by invisible quantum fields like the electromagnetic field

1048
00:53:36,360 --> 00:53:37,199
or the Higgs field.

1049
00:53:37,239 --> 00:53:38,840
Speaker 1: Okay, fields everywhere.

1050
00:53:38,480 --> 00:53:42,280
Speaker 2: And the universe as a whole system seeks to exist

1051
00:53:42,320 --> 00:53:45,840
in the lowest possible energy state, much like water flowing

1052
00:53:45,880 --> 00:53:49,199
down a mountain to reach the sea. The absolute lowest

1053
00:53:49,239 --> 00:53:52,440
possible energy state for the universe's fields is known as

1054
00:53:52,480 --> 00:53:58,159
the true vacuum. It represents the most stable, RESTful configuration

1055
00:53:58,239 --> 00:53:59,320
of reality.

1056
00:53:58,920 --> 00:54:02,119
Speaker 1: Possible, like a resting comfortably at the very bottom of

1057
00:54:02,159 --> 00:54:04,239
the deepest valley in a mountain range. It can't roll

1058
00:54:04,280 --> 00:54:06,960
any lower. It's perfectly stable, exactly.

1059
00:54:06,679 --> 00:54:10,800
Speaker 2: But the terrifying mathematical truth, which gained immense traction and

1060
00:54:10,880 --> 00:54:14,000
serious academic debate after the physical discovery of the Higg

1061
00:54:14,039 --> 00:54:17,000
boson it cern in twenty twelve, is that our universe

1062
00:54:17,079 --> 00:54:19,000
might not actually be at the bottom of the valley.

1063
00:54:19,079 --> 00:54:20,199
Speaker 1: We might be somewhere else.

1064
00:54:20,239 --> 00:54:24,119
Speaker 2: We might currently exist in what physicists ominously call a

1065
00:54:24,159 --> 00:54:25,079
false vacuum.

1066
00:54:25,159 --> 00:54:26,679
Speaker 1: Okay, I want to push back on this, or at

1067
00:54:26,760 --> 00:54:29,320
least play devil's advocate. If the universe is in a

1068
00:54:29,360 --> 00:54:33,199
false vacuum, meaning it's inherently unstable, how has it survived

1069
00:54:33,239 --> 00:54:36,599
for thirteen point eight billion years? If it's unstable, shouldn't

1070
00:54:36,639 --> 00:54:39,320
it have collapsed by now? Why do physicists think the

1071
00:54:39,400 --> 00:54:41,159
Higgs field might be in the wrong place?

1072
00:54:41,639 --> 00:54:44,239
Speaker 2: You are touching on the exact paradox that makes this

1073
00:54:44,719 --> 00:54:49,199
field of study so intense. Calculations based on the precise

1074
00:54:49,400 --> 00:54:52,920
measured mass of the Higgs boson, which gives all fundamental

1075
00:54:53,000 --> 00:54:55,880
particles their mass, and the mass of the top quark,

1076
00:54:56,239 --> 00:54:58,599
suggests that the Higgs field might currently exist in a

1077
00:54:58,639 --> 00:55:02,679
perfectly metated stable state, that tastable. That means it is

1078
00:55:02,719 --> 00:55:05,639
in a temporary local minimum. It is in a higher

1079
00:55:05,760 --> 00:55:09,039
energy valley. It merely appears stable to us because we've

1080
00:55:09,039 --> 00:55:12,159
never known anything else, but it absolutely isn't the final

1081
00:55:12,719 --> 00:55:14,719
lowest point the mathematics allow for.

1082
00:55:15,159 --> 00:55:18,079
Speaker 1: So it's like a ball resting precariously in a tiny

1083
00:55:18,159 --> 00:55:21,559
divot on a tiny ledge halfway up a ridiculously steep

1084
00:55:21,599 --> 00:55:24,679
mountain side. It looks stable, it hasn't moved for thirteen

1085
00:55:24,679 --> 00:55:26,800
point eight billion years because the divot is just deep

1086
00:55:26,880 --> 00:55:28,719
enough to hold it. But if you push it just

1087
00:55:28,760 --> 00:55:30,480
a tiny bit, it's going to roll out of the

1088
00:55:30,480 --> 00:55:32,199
divot and fall all the way down to the bottom

1089
00:55:32,239 --> 00:55:32,679
of the mountain.

1090
00:55:32,920 --> 00:55:35,760
Speaker 2: That is the precise physical scenario, and the terrifying part

1091
00:55:35,840 --> 00:55:37,880
is that the push doesn't even need to be a

1092
00:55:37,880 --> 00:55:41,039
massive physical force. Yeah, in the quantum realm, there is

1093
00:55:41,079 --> 00:55:43,639
a proven phenomenon called quantum tunneling.

1094
00:55:43,440 --> 00:55:44,599
Speaker 1: Right where particles cheap.

1095
00:55:44,920 --> 00:55:48,800
Speaker 2: Basically, yes, because quantum particles behave as both particles and

1096
00:55:48,880 --> 00:55:53,199
waves of probability, they can spontaneously pass through solid energy

1097
00:55:53,239 --> 00:55:56,400
barriers without actually having enough energy to climb over them.

1098
00:55:56,639 --> 00:55:58,400
They just suddenly appear on the other side.

1099
00:55:58,480 --> 00:56:01,280
Speaker 1: So the ball just blips through the of the divot at.

1100
00:56:01,199 --> 00:56:04,920
Speaker 2: Literally any moment anywhere in the infinite expanse of the universe.

1101
00:56:05,400 --> 00:56:10,400
A totally random quantum fluctuation could spontaneously cause a tiny

1102
00:56:10,840 --> 00:56:13,960
microscopic region of the Higgs field to tunnel through that

1103
00:56:14,039 --> 00:56:17,039
barrier and drop down into the true vacuum state.

1104
00:56:17,360 --> 00:56:20,679
Speaker 1: And when that microscopic region drops down the mountain, what

1105
00:56:20,760 --> 00:56:22,519
happens to the space around it.

1106
00:56:22,519 --> 00:56:26,239
Speaker 2: It creates a localized bubble of radically altered physics. And

1107
00:56:26,280 --> 00:56:29,000
because this new true vacuum state is at a lower

1108
00:56:29,079 --> 00:56:32,360
energy level, is more stable, and it aggressively converts the

1109
00:56:32,360 --> 00:56:36,320
false vacuum around it. This bubble immediately begins expanding outward

1110
00:56:36,360 --> 00:56:38,159
in all directions at the exact speed of light.

1111
00:56:38,320 --> 00:56:39,559
Speaker 1: Expanding at light speed.

1112
00:56:39,760 --> 00:56:42,960
Speaker 2: As the bubble wall passes through space, it fundamentally and

1113
00:56:43,159 --> 00:56:48,119
violently rewrites the core laws of nature. Inside this expanding bubble,

1114
00:56:48,360 --> 00:56:51,800
the properties of the Higgs field change entirely. The fundamental

1115
00:56:51,840 --> 00:56:55,000
forces that dictate reality would completely shift.

1116
00:56:54,800 --> 00:56:59,039
Speaker 1: So the electromagnetic force might suddenly become vastly stronger, or

1117
00:56:59,199 --> 00:57:03,679
gravity might differently, or the strong nuclear force binding quarks

1118
00:57:03,760 --> 00:57:04,320
could weaken.

1119
00:57:04,559 --> 00:57:08,239
Speaker 2: Yes, and these aren't just minor adjustments to the universal thermostat.

1120
00:57:08,519 --> 00:57:12,440
These mathematical changes would make chemistry, biology, and solid matter

1121
00:57:12,519 --> 00:57:14,519
as we know it completely impossible.

1122
00:57:14,559 --> 00:57:15,400
Speaker 1: It just wouldn't work.

1123
00:57:15,519 --> 00:57:18,920
Speaker 2: Atoms would either instantly collapse in on themselves or their

1124
00:57:18,960 --> 00:57:23,880
electron clouds would violently fly apart. Complex structures like organic molecules,

1125
00:57:23,920 --> 00:57:27,679
living cells, stars, and planets simply couldn't physically exist under

1126
00:57:27,679 --> 00:57:31,480
these new mathematical laws. Everything inside the bubble is instantly

1127
00:57:31,480 --> 00:57:34,599
reduced to elementary particles behaving under alien laws of physics.

1128
00:57:34,920 --> 00:57:37,719
Speaker 1: And because the bubble wall is expanding at the exact

1129
00:57:37,760 --> 00:57:41,559
speed of light, there is absolutely zero warning. You can't

1130
00:57:41,599 --> 00:57:44,360
see it coming through a telescope. Because the light carrying

1131
00:57:44,440 --> 00:57:47,760
the image of the approaching bubble arrives at your eye

1132
00:57:47,840 --> 00:57:49,639
at the exact same instant as the.

1133
00:57:49,559 --> 00:57:51,480
Speaker 2: Bubble wall itself, you never know what happened.

1134
00:57:51,559 --> 00:57:55,000
Speaker 1: One instant, the universe functions perfectly normally, as it has

1135
00:57:55,039 --> 00:57:58,880
for billions of years. You are sipping your coffee listening

1136
00:57:58,880 --> 00:58:02,400
to a discussion. The next instant, without even a millisecond

1137
00:58:02,440 --> 00:58:06,199
to process it, everything within the expanding sphere ceases to

1138
00:58:06,280 --> 00:58:10,519
exist in any meaningful way, instantly replaced by a fundamentally

1139
00:58:10,519 --> 00:58:14,440
different reality where the basic building blocks of matter itself

1140
00:58:14,519 --> 00:58:15,880
simply no longer function.

1141
00:58:16,199 --> 00:58:18,719
Speaker 2: And this brings us to the core of philosophical terror

1142
00:58:18,760 --> 00:58:22,239
of false vacuum decay. It is the ultimate cosmic threat

1143
00:58:22,360 --> 00:58:25,159
because of its complete and utter randomness. It is not

1144
00:58:25,239 --> 00:58:27,920
a question of if the universe will eventually collapse into

1145
00:58:27,960 --> 00:58:29,360
the true vacuum.

1146
00:58:28,960 --> 00:58:32,199
Speaker 1: But when, and that when is entirely unknown.

1147
00:58:32,000 --> 00:58:36,159
Speaker 2: And that when could be right now, tomorrow, or in

1148
00:58:36,199 --> 00:58:40,280
a trillion years. Because it operates on quantum probability, every

1149
00:58:40,280 --> 00:58:44,000
single high energy event in the universe, massive particle collisions,

1150
00:58:44,039 --> 00:58:48,079
in cosmic rays, hyper energetic supernova explosions, or the intense

1151
00:58:48,159 --> 00:58:51,960
twisted energy churning near black holes, represents a potential trigger point,

1152
00:58:52,119 --> 00:58:55,079
providing enough energy to knock that ball off the ledge.

1153
00:58:55,239 --> 00:58:55,639
Speaker 1: Wow.

1154
00:58:55,800 --> 00:58:58,239
Speaker 2: Each one is a cosmic dice roll that could instantly

1155
00:58:58,280 --> 00:59:00,480
and permanently end reality as well we know it.

1156
00:59:00,760 --> 00:59:03,559
Speaker 1: So what do we do with all this? We've unraveled

1157
00:59:03,559 --> 00:59:06,199
the mechanics of superflares that could hurl us into the

1158
00:59:06,280 --> 00:59:10,079
dark ages tomorrow afternoon. We've looked at the grim reality

1159
00:59:10,079 --> 00:59:13,519
of our galactic radiation desert and how our very evolution

1160
00:59:13,719 --> 00:59:16,280
is tied to drifting into a temporary, fragile bubble.

1161
00:59:16,360 --> 00:59:17,519
Speaker 2: We've covered a lot of ground.

1162
00:59:17,639 --> 00:59:20,159
Speaker 1: We really have we've discussed the tragic rhythm of the

1163
00:59:20,159 --> 00:59:23,719
cosmic ray extinction cycle plunging us into the galactic mid plane,

1164
00:59:23,760 --> 00:59:27,079
the literal consumption and erasure of our galactic neighbors, the

1165
00:59:27,199 --> 00:59:31,159
incomprehensible gravitational drag of the Great Attractor.

1166
00:59:30,760 --> 00:59:33,760
Speaker 2: The atom dissolving terror of magnetar starquakes.

1167
00:59:34,159 --> 00:59:38,159
Speaker 1: Yeah, and the sterilizing sniper fire of quasars and GRBs,

1168
00:59:38,840 --> 00:59:41,440
the slow tearing of the Big Rip, and finally, that

1169
00:59:41,639 --> 00:59:46,000
instant physics deleting bubble of false vacuum decay. After sitting

1170
00:59:46,079 --> 00:59:48,840
with all of this, the fact that we are sitting here, breathing,

1171
00:59:49,000 --> 00:59:53,679
thinking and unraveling these mysteries together, it is a statistical miracle,

1172
00:59:54,000 --> 00:59:56,639
it really is. We are balancing on a tightrope over

1173
00:59:56,719 --> 00:59:59,400
an active volcano during a Category five hurricane.

1174
00:59:59,679 --> 01:00:02,519
Speaker 2: Truly, But I want to reiterate the thought we start with,

1175
01:00:02,639 --> 01:00:06,639
because it is the most important takeaway from astrophysics. Understanding

1176
01:00:06,719 --> 01:00:10,199
these astronomical dangers. Sitting with the sheer scale of this

1177
01:00:10,320 --> 01:00:13,519
cosmic violence, it shouldn't induce a paralyzing dread.

1178
01:00:13,639 --> 01:00:15,800
Speaker 1: It shouldn't make you want to just give up.

1179
01:00:15,960 --> 01:00:20,239
Speaker 2: Instead, it should inspire an immense, profound gratitude. The universe

1180
01:00:20,280 --> 01:00:24,679
is terrifyingly hostile, yes, but against all mathematical odds, the precise,

1181
01:00:24,880 --> 01:00:27,400
delicate balance of forces in our tiny corner of the

1182
01:00:27,440 --> 01:00:30,280
cosmos has held together long enough for matter to wake up,

1183
01:00:30,519 --> 01:00:33,320
look around, and begin to understand the very forces that

1184
01:00:33,360 --> 01:00:33,840
threaten it.

1185
01:00:33,880 --> 01:00:34,800
Speaker 1: We get to perceive it.

1186
01:00:34,960 --> 01:00:37,559
Speaker 2: We are granted a moment in the cosmic sun, a

1187
01:00:37,599 --> 01:00:41,119
brief window to experience the universe in all its terrifying beauty.

1188
01:00:41,800 --> 01:00:44,199
That consciousness is something to be fiercely cherished.

1189
01:00:44,480 --> 01:00:47,039
Speaker 1: I couldn't agree more. It makes the mundane moments feel

1190
01:00:47,079 --> 01:00:50,840
incredibly special. But I want to leave you, the listener

1191
01:00:50,920 --> 01:00:54,159
with one final mind bending thought to ponder that we

1192
01:00:54,199 --> 01:00:57,920
haven't even touched on yet. If the universe is truly infinite,

1193
01:00:58,039 --> 01:01:01,679
as many cosmological models suggest, and quantum tunneling is a

1194
01:01:01,719 --> 01:01:06,039
purely random probability, that means false vacuum decay is statistically

1195
01:01:06,320 --> 01:01:09,760
guaranteed to have already happened somewhere out there, somewhere out there,

1196
01:01:09,760 --> 01:01:12,480
in the infinite dark right now, there could be billions

1197
01:01:12,519 --> 01:01:16,280
of these reality destroying bubbles already expanding at the speed

1198
01:01:16,320 --> 01:01:18,880
of light. We just haven't seen them yet because their

1199
01:01:18,960 --> 01:01:22,599
light hasn't reached us. We exist in a fleeting pocket

1200
01:01:22,639 --> 01:01:25,480
of time, simply weighing for a wave that has already

1201
01:01:25,480 --> 01:01:26,239
been set in motion.

1202
01:01:26,519 --> 01:01:28,360
Speaker 2: That is quite the thought to leave off on.

1203
01:01:28,719 --> 01:01:32,760
Speaker 1: So out of everything we unravel today, which cosmic threat

1204
01:01:32,840 --> 01:01:36,119
completely shifted your perspective on our place in the universe?

1205
01:01:36,719 --> 01:01:40,039
Does knowing about the instantaneous random nature of the false

1206
01:01:40,119 --> 01:01:43,199
vacuum make you nihilistic? Or does the idea of living

1207
01:01:43,280 --> 01:01:46,719
in a rare, protective galactic bubble make you feel incredibly

1208
01:01:46,800 --> 01:01:47,800
lucky to just be here?

1209
01:01:47,880 --> 01:01:49,119
Speaker 2: We really want to know what you think.

1210
01:01:49,360 --> 01:01:51,440
Speaker 1: Drop a comment and tell us where you stand, because

1211
01:01:51,480 --> 01:01:54,239
I'd love to read your thoughts. Thank you for joining

1212
01:01:54,320 --> 01:01:56,920
us as we pull at the strings of reality. We

1213
01:01:56,960 --> 01:01:59,960
will be back to keep unraveling the universe's greatest mystery.

1214
01:02:00,119 --> 01:02:04,000
Reason our next exploration right here on Thrilling Threads. Stay curious.