WEBVTT 1 00:00:03.399 --> 00:00:07.719 Welcome to Bedtime Astronomy. Explore the wonders of the cosmos 2 00:00:07.759 --> 00:00:12.279 with our soothing Bedtime Astronomie podcast. Each episode offers a 3 00:00:12.359 --> 00:00:16.320 gentle journey through the stars, planets, and beyond, perfect for 4 00:00:16.399 --> 00:00:20.239 unwinding after a long day. Let's travel through the mysteries 5 00:00:20.239 --> 00:00:22.440 of the universe as you drift off into a peaceful 6 00:00:22.480 --> 00:00:23.800 slumber under the night sky. 7 00:00:26.920 --> 00:00:30.440 So imagine turning on a machine right, roughly the size 8 00:00:30.440 --> 00:00:32.880 of a standard garden hose, Yeah, just a regular hose, 9 00:00:33.079 --> 00:00:36.079 and within the span of a single human career, you 10 00:00:36.280 --> 00:00:40.320 literally watch rivers begin to flow on a completely dead planet. 11 00:00:40.439 --> 00:00:42.240 It tells wild, I know, it really does. 12 00:00:42.520 --> 00:00:46.079 Like today, we aren't indulging in some thousand year science 13 00:00:46.119 --> 00:00:49.880 fiction fantasy or you know, abstract philosophical thought experiment. 14 00:00:50.079 --> 00:00:53.479 No, not at all. We are unpacking a rigorously detailed, 15 00:00:53.840 --> 00:00:56.240 paradigm shifting mathematical. 16 00:00:55.679 --> 00:00:59.880 Model, right, a model that proves humanity could artificially jumpstart 17 00:00:59.880 --> 00:01:03.840 the Martian climate and actually reach the threshold for liquid 18 00:01:03.920 --> 00:01:06.120 water in just fifteen years. 19 00:01:06.000 --> 00:01:09.480 Which is an incredibly brief time scale in planetary term. 20 00:01:09.480 --> 00:01:13.120 Okay, let's unpack this because to truly grasp the sheer 21 00:01:13.280 --> 00:01:16.920 mind bending scale of the thermodynamic problem we are solving today. 22 00:01:17.280 --> 00:01:20.439 You have to completely let go of those romanticized, red 23 00:01:20.480 --> 00:01:23.079 tinted horizons you see in the movies, you really do. 24 00:01:23.319 --> 00:01:26.079 You have to step into the grim, terrifying reality of 25 00:01:26.120 --> 00:01:28.680 what the Martian environment actually is right the. 26 00:01:28.680 --> 00:01:32.760 Second it is a profoundly hostile environment, and understanding the 27 00:01:32.799 --> 00:01:36.760 specific mechanics of that hostility, well, it's the only way 28 00:01:36.799 --> 00:01:40.480 to understand why this new engineering approach is so revolutionary. Exactly, 29 00:01:40.760 --> 00:01:43.640 we are talking about taking a planetary body that has 30 00:01:43.680 --> 00:01:48.359 been ecologically dormant for billions of years and physically forcing 31 00:01:48.439 --> 00:01:51.680 a global climate system to boot up from scratch. 32 00:01:52.120 --> 00:01:55.239 I want you listening right now to close your eyes 33 00:01:55.280 --> 00:01:58.760 and really put yourself on the surface of Mars. Just 34 00:01:58.959 --> 00:02:00.200 imagine standing there. 35 00:02:00.439 --> 00:02:02.599 It's not a pleasant thought, no, I. 36 00:02:02.599 --> 00:02:06.719 Mean, the average global temperature is negative fifty five degrees celsius. 37 00:02:06.879 --> 00:02:08.240 And that's merely the average. 38 00:02:08.360 --> 00:02:10.639 Right If you happen to be standing there during one 39 00:02:10.680 --> 00:02:12.840 of the global dust storms, which by the way, can 40 00:02:12.879 --> 00:02:15.879 shroud the entire planet for months at a time, the 41 00:02:15.919 --> 00:02:19.240 surface temperature plunges to a brutal negative one hundred and 42 00:02:19.240 --> 00:02:20.719 twenty five degrees celsius. 43 00:02:20.800 --> 00:02:22.840 You would freeze almost instantly, and if you. 44 00:02:22.759 --> 00:02:26.080 Try to take a breath, the atmosphere is practically non existent. 45 00:02:26.159 --> 00:02:29.280 It's this razor thin, wispy layer made of ninety five 46 00:02:29.360 --> 00:02:30.759 percent carbon dioxide. 47 00:02:30.800 --> 00:02:32.639 Plus if you're looking for water, you will not find 48 00:02:32.639 --> 00:02:33.080 it flowing. 49 00:02:33.319 --> 00:02:37.439 Yeah, it's locked up, frozen solid, mixed deep within ice 50 00:02:37.479 --> 00:02:39.960 caps made of pure carbon dioxide. 51 00:02:40.080 --> 00:02:41.400 And we can't forget the radiation. 52 00:02:41.560 --> 00:02:43.840 Oh yeah, because there is no magnetic field and no 53 00:02:43.879 --> 00:02:47.599 ozone layer, you are constantly subjected to lethal doses of 54 00:02:47.680 --> 00:02:50.319 solar and ultraviolet radiations. 55 00:02:49.680 --> 00:02:50.960 A contempt bombardment, and. 56 00:02:50.919 --> 00:02:55.560 If a solar flare hits, the surface becomes utterly toxic 57 00:02:55.759 --> 00:02:59.639 to terrestrial biology. So Disneyland, it is not grounding. 58 00:02:59.680 --> 00:03:03.599 The compon versation in those physical parameters is so essential 59 00:03:04.120 --> 00:03:07.159 because the magnitude of this challenge. It really comes down 60 00:03:07.199 --> 00:03:09.719 to raw thermodynamics. 61 00:03:08.960 --> 00:03:10.000 Just heat and energy. 62 00:03:10.400 --> 00:03:14.080 Exactly. When you look at the empirical data, the atmosphereic pressure, 63 00:03:14.159 --> 00:03:17.400 the thermal inertia of the regulars, the radiation environment, you 64 00:03:17.520 --> 00:03:20.599 realize that Mars is not just dead, it is actively 65 00:03:20.639 --> 00:03:24.479 resisting the retention of heat. Yeah, it is the thermal 66 00:03:24.479 --> 00:03:27.719 inertia of the Martian surface is incredibly low because the 67 00:03:27.759 --> 00:03:31.719 regolith is mostly crushed porous volcanic rock and fine dust. 68 00:03:31.520 --> 00:03:32.879 So it can't hold onto warmth. 69 00:03:33.159 --> 00:03:37.479 Right, it cannot store thermal energy the way Earth's dense, 70 00:03:37.639 --> 00:03:41.639 moist soils or vast oceans do. Heat hits the surface, 71 00:03:42.199 --> 00:03:45.680 warms the top millimeter of dust for like a few. 72 00:03:45.439 --> 00:03:48.199 Hours, and then the sunsets, and the moment. 73 00:03:47.960 --> 00:03:52.039 The sunsets, that thermal energy violently radiates back out into 74 00:03:52.039 --> 00:03:53.080 the vacuumus space. 75 00:03:53.240 --> 00:03:56.439 So the planet itself is basically a giant sieve for 76 00:03:56.560 --> 00:03:57.360 solar energy. 77 00:03:57.479 --> 00:03:58.560 That's a great way to put it. 78 00:03:58.639 --> 00:04:03.000 And because the environment is so unimaginably extreme, it naturally 79 00:04:03.039 --> 00:04:06.000 follows that our earliest ideas to fix it were equally 80 00:04:06.039 --> 00:04:09.479 extreme absolute. I mean, human beings have a psychological tendency 81 00:04:09.879 --> 00:04:14.319 to look at a massive, unyielding problem and think, uh, okay, 82 00:04:14.360 --> 00:04:16.439 how do we hit this with the biggest hammer possible? 83 00:04:16.519 --> 00:04:17.480 The brute force approach. 84 00:04:17.600 --> 00:04:19.639 Exactly, we have to talk about the brute force approach 85 00:04:19.720 --> 00:04:23.720 and specifically why trying to bludgeon a planetary climate into 86 00:04:23.759 --> 00:04:25.480 submission mathematically fails. 87 00:04:25.639 --> 00:04:28.680 The macroscopic brute force era is such a fascinating piece 88 00:04:28.720 --> 00:04:31.439 of our recent scientific history. For a long time, the 89 00:04:31.480 --> 00:04:35.439 dominant conversation round modifying the Martian climate centered entirely on 90 00:04:35.600 --> 00:04:37.920 highly energetic interventions. 91 00:04:37.839 --> 00:04:41.120 Which brings us to the most famous proposal. You'll probably 92 00:04:41.120 --> 00:04:45.879 know this one, using continuous low fallout nuclear explosions detonated 93 00:04:45.959 --> 00:04:47.199 high above the Martian polls. 94 00:04:47.360 --> 00:04:49.160 It's very dramatic concept. 95 00:04:48.959 --> 00:04:51.920 Very The core idea was that these detonations would act 96 00:04:52.000 --> 00:04:57.160 like artificial suns. Right the intense localized bursts of thermal 97 00:04:57.240 --> 00:05:01.199 radiation would flash melt the vast car dioxide ice caps 98 00:05:01.279 --> 00:05:03.040 locked at the northern and southern. 99 00:05:02.720 --> 00:05:06.720 Poles, releasing massive amounts of CO two gas directly into. 100 00:05:06.600 --> 00:05:10.120 The atmosphere right theoretically thickening it and triggering a runaway 101 00:05:10.160 --> 00:05:13.000 greenhouse effect. I mean, on paper, it sounds like a decisive, 102 00:05:13.040 --> 00:05:14.720 aggressive stroke of engineering. 103 00:05:14.800 --> 00:05:17.319 It appeals to that instinct of wanting a quick fix. 104 00:05:17.439 --> 00:05:20.120 Yeah, you bomb the sky, you vaporize the ice, the 105 00:05:20.160 --> 00:05:23.199 atmosphere catches the heat, and the planet warms up. Boom done. 106 00:05:23.319 --> 00:05:27.120 But planetary physics does not respond to aggressive intentions. It 107 00:05:27.160 --> 00:05:29.720 responds to sustain thermodynamic forcing. 108 00:05:29.839 --> 00:05:32.000 And that's where the math comes in to ruin the party. 109 00:05:32.079 --> 00:05:36.079 Precisely in twenty eighteen, the scientific community delivered a massive 110 00:05:36.079 --> 00:05:40.839 mathematical reality check that completely dismantled this entire brute force concept. 111 00:05:40.879 --> 00:05:42.800 They really ran the numbers they did. 112 00:05:43.439 --> 00:05:47.560 Researchers systematically crunched the exact volumetric numbers on what the 113 00:05:47.600 --> 00:05:50.600 Martian polar caps actually contain, and then they map that 114 00:05:50.680 --> 00:05:54.120 against the specific heat capacity of carbon dioxide. 115 00:05:53.480 --> 00:05:56.639 To see how the global atmosphere would realistically respond to 116 00:05:56.680 --> 00:05:59.800 that level of acute thermal forcing exactly. The numbers from 117 00:05:59.839 --> 00:06:03.240 that that twenty eighteen reality check are just staggering. When 118 00:06:03.240 --> 00:06:05.639 you look at them side by side, they are very sobering. 119 00:06:05.800 --> 00:06:08.920 Let's break down the actual atmospheric physics at play here 120 00:06:09.160 --> 00:06:13.160 right now. Mars naturally possesses a very weak greenhouse effect 121 00:06:13.399 --> 00:06:15.759 of about five degrees celsius. 122 00:06:15.319 --> 00:06:19.319 And it operates at an atmospheric pressure of roughly six millibars. 123 00:06:18.879 --> 00:06:20.920 Right And for context, if you are standing at sea 124 00:06:21.000 --> 00:06:25.240 level on Earth, you're experiencing about one thousand millibars of pressure. 125 00:06:25.720 --> 00:06:29.120 So the Martian atmosphere is practically a vacuum by comparison. 126 00:06:29.279 --> 00:06:32.639 And the twenty eighteen analysis proved definitively that even if 127 00:06:32.680 --> 00:06:35.800 you executed this nuclear plan with impossible. 128 00:06:35.160 --> 00:06:37.360 Perfection like flawless execution. 129 00:06:37.720 --> 00:06:42.560 Yeah, even if you utilized maximum explosive yield to vaporize 130 00:06:42.639 --> 00:06:45.959 every single accessible molecule of CO two trapped at the poles, 131 00:06:46.560 --> 00:06:49.439 you would only push the atmospheric pressure up from six 132 00:06:49.519 --> 00:06:51.279 millibars to about twenty. 133 00:06:51.000 --> 00:06:53.040 Millibars, which is still incredibly thin. 134 00:06:53.319 --> 00:06:56.160 It's only two percent of Earth's atmospheric. 135 00:06:55.639 --> 00:06:59.519 Pressure, precisely two percent, and the corresponding thermal boost from 136 00:06:59.600 --> 00:07:02.959 double or tripling that incredibly thin CO two layer, it 137 00:07:02.959 --> 00:07:05.879 would only yield a ten degrees celsius increase to the 138 00:07:05.920 --> 00:07:07.759 average surface temperature. 139 00:07:07.439 --> 00:07:10.759 Ten degrees just ten. You'd drop continuous nuclear weapons on 140 00:07:10.800 --> 00:07:13.560 a planet, and your return on investment is a ten 141 00:07:13.639 --> 00:07:14.360 degree bump. 142 00:07:14.439 --> 00:07:15.560 It's highly inefficient. 143 00:07:15.720 --> 00:07:19.000 Practically speaking, a ten degree boost is an absolute drop 144 00:07:19.000 --> 00:07:21.639 in the bucket. When the goal is habitability. I mean, 145 00:07:21.680 --> 00:07:25.040 if the average is negative fifty five degrees celsius, we 146 00:07:25.079 --> 00:07:27.279 need a global warm up of at least thirty to 147 00:07:27.319 --> 00:07:30.879 forty degrees celsius just to reach the baseline required to 148 00:07:30.920 --> 00:07:33.120 maintain stable liquid water on the surface. 149 00:07:33.240 --> 00:07:36.639 Without stable liquid water, you don't have a hydrological cycle. 150 00:07:36.439 --> 00:07:39.120 Right, you don't have agriculture, and you certainly don't have biology. 151 00:07:39.360 --> 00:07:43.519 The idea of brute forcing the planet with explosions reeks 152 00:07:43.759 --> 00:07:47.920 of this incredible hubris, oh totally, this assumption that we 153 00:07:47.959 --> 00:07:53.079 can easily override planetary thermodynamics with pure explosive yield. If 154 00:07:53.120 --> 00:07:55.639 we connect this to the bigger picture, it highlights a 155 00:07:55.639 --> 00:07:59.519 fundamental misunderstanding of how climates actually function. How so well. 156 00:08:00.000 --> 00:08:05.160 It cannot permanently alter a massive, complex fluid system through isolated, 157 00:08:05.279 --> 00:08:07.040 transient energetic. 158 00:08:06.600 --> 00:08:10.279 Events, because explosions are just flashes in the pan exactly. 159 00:08:10.720 --> 00:08:13.439 Explosions release a tremendous amount of energy in fractions of 160 00:08:13.480 --> 00:08:17.600 a second, but planetary climates are dictated by sustained systemic 161 00:08:17.720 --> 00:08:21.800 changes in how continuous energy from the Sun is absorbed, trapped, 162 00:08:21.839 --> 00:08:23.839 and circulated over long periods of time. 163 00:08:24.199 --> 00:08:27.680 So it's like trying to heat a sprawling, freezing mansion 164 00:08:27.839 --> 00:08:29.759 by lighting a single match in the attic. 165 00:08:29.920 --> 00:08:33.320 That is a perfect analogy. The nuclear approach is an acute, 166 00:08:33.399 --> 00:08:37.399 localized event trying to solve a chronic global problem. It 167 00:08:37.440 --> 00:08:41.799 is thermodynamically wildly inefficient because the heat just vanishes, right 168 00:08:41.879 --> 00:08:44.799 Because the atmosphere is so thin, The vast majority of 169 00:08:44.799 --> 00:08:47.799 the thermal energy from those blasts wouldn't be captured by 170 00:08:47.799 --> 00:08:50.759 the surrounding gas. It would simply radiate outward into the 171 00:08:50.840 --> 00:08:51.639 vacuum of space. 172 00:08:52.039 --> 00:08:56.360 So if macroscopic explosions fall mathematically short, if the biggest 173 00:08:56.399 --> 00:08:59.360 atomic hammers we can dream up fail to dent the problem, 174 00:09:00.039 --> 00:09:02.399 we have to rethink the scale of the intervention entirely. 175 00:09:02.600 --> 00:09:04.600 We have to look in the complete opposite direction. 176 00:09:04.840 --> 00:09:07.480 Right. If going incredibly big fails, we have to go 177 00:09:07.559 --> 00:09:08.559 incredibly small. 178 00:09:08.919 --> 00:09:13.720 The shift from macroscopic brute force to microscopic precision is 179 00:09:13.720 --> 00:09:17.039 where the actual viability of planetary engineering begins. 180 00:09:17.320 --> 00:09:22.320 And we are talking about the nanotech solution, specifically engineered aerosols. 181 00:09:22.440 --> 00:09:24.879 Yes, this is the core of the new research. 182 00:09:25.000 --> 00:09:27.759 This brings us to the breakthrough concept recently published by 183 00:09:27.759 --> 00:09:31.759 a global team of atmosphered physicists and engineers. Like, instead 184 00:09:31.759 --> 00:09:35.639 of nuking the poles, the proposed method involves releasing microscopically 185 00:09:35.679 --> 00:09:39.320 engineered aerosols directly into the Martian atmosphere. 186 00:09:38.799 --> 00:09:41.519 To create what they call a sustained infrared forcing that 187 00:09:41.559 --> 00:09:42.480 warms the surface. 188 00:09:42.639 --> 00:09:46.200 But to understand why this approach is theoretically sound, we 189 00:09:46.279 --> 00:09:49.279 really need to explore the exact physical nature of these 190 00:09:49.320 --> 00:09:52.840 proposed particles, because I mean, they're not just generic dust, No, 191 00:09:52.960 --> 00:09:53.480 not at all. 192 00:09:53.840 --> 00:09:58.440 The researchers model two specific candidates. The first are graphene discs, 193 00:09:58.799 --> 00:10:02.360 which are incredible thin, measuring about two hundred and fifty 194 00:10:02.440 --> 00:10:05.799 nanometers in diameter. Okay, that's tiny, very tiny. But the 195 00:10:05.840 --> 00:10:10.799 second candidate, which showed a remarkable efficacy, involves aluminum rods. 196 00:10:11.440 --> 00:10:14.600 These are about eight microns long and roughly sixteen nanimeters 197 00:10:14.639 --> 00:10:15.159 in diameter. 198 00:10:15.200 --> 00:10:19.000 Okay, wait, let's visualize this. An average human hair is 199 00:10:19.120 --> 00:10:23.000 what about eighty thousand nanometers wide roughly, Yeah, and we 200 00:10:23.080 --> 00:10:27.360 are talking about aluminum rods that are sixteen nanometers wide. Wait, 201 00:10:27.399 --> 00:10:30.799 are we seriously talking about spraying microscopic glitter into the 202 00:10:30.840 --> 00:10:31.519 alien sky? 203 00:10:31.799 --> 00:10:37.360 Mechanically speaking, yes, but it is highly engineered, thermodynamically tuned glitter. 204 00:10:37.480 --> 00:10:40.559 I have to challenge this immediately. How does microscopic glitter 205 00:10:40.639 --> 00:10:42.799 achieve what megatons of nuclear force? 206 00:10:42.879 --> 00:10:44.840 Couldn't It seems counterintuitive? Right? 207 00:10:44.879 --> 00:10:47.360 If the wind blows a thin layer of metallic dust 208 00:10:47.360 --> 00:10:49.759 into the air, wouldn't that just block the sun and 209 00:10:49.759 --> 00:10:52.360 make the planet even colder, like a nuclear winter. 210 00:10:52.559 --> 00:10:55.000 That is exactly what would happen if we use generic dust, 211 00:10:55.320 --> 00:10:57.919 which is why the precise dimensions of these particles are 212 00:10:57.919 --> 00:10:59.360 the key to the entire concept. 213 00:10:59.480 --> 00:11:01.240 So the saw is what matters here. 214 00:11:01.399 --> 00:11:04.879 Absolutely. It comes down to the mechanics of electromagnetic radiation 215 00:11:05.519 --> 00:11:09.559 and how specific geometric shapes interact with different wavelengths of light. 216 00:11:09.679 --> 00:11:11.240 Okay, break that down for us. 217 00:11:11.440 --> 00:11:14.080 So the Sun pumps out energy, primarily in the form 218 00:11:14.120 --> 00:11:18.399 of shortwave, visible light and ultraviolet radiation. When that shortwave 219 00:11:18.480 --> 00:11:21.960 radiation travels through the Martian atmosphere and hits the surface, 220 00:11:22.440 --> 00:11:25.240 the rock and dust absorb it, worm up slightly and 221 00:11:25.279 --> 00:11:27.000 then reradiate that energy back outward. 222 00:11:27.399 --> 00:11:30.600 But the planet doesn't glow in the dark. It reradiates 223 00:11:30.600 --> 00:11:31.720 that energy as heat. 224 00:11:31.919 --> 00:11:35.080 Correct, it radiates the energy as thermal infrared radiation, which 225 00:11:35.120 --> 00:11:36.039 is long wave energy. 226 00:11:36.120 --> 00:11:38.799 Okay, shortwave from the Sun long way from the ground. 227 00:11:38.919 --> 00:11:41.440 Right. The wavelength of the incoming sunlight is very short, 228 00:11:41.480 --> 00:11:44.639 between four hundred and seven hundred nanometers, but the wavelength 229 00:11:44.639 --> 00:11:47.320 of the heat radiating off the Martian surface is much longer, 230 00:11:47.440 --> 00:11:48.840 typically around ten microns. 231 00:11:48.919 --> 00:11:50.279 And what happens right now with that. 232 00:11:50.279 --> 00:11:53.639 Heat in Mars's current state, that ten micron thermal infrared 233 00:11:53.720 --> 00:11:57.159 radiation just bounces right off the surface and escapes back 234 00:11:57.159 --> 00:11:59.840 into the vacuum of space. Because the thin CO two 235 00:11:59.879 --> 00:12:04.799 atmosphere is almost entirely transparent to those specific long wavelengths. 236 00:12:04.320 --> 00:12:06.159 Heat goes in, heat goes right back. 237 00:12:06.039 --> 00:12:08.360 Out exactly heat goes in, heat goes right. 238 00:12:08.279 --> 00:12:12.440 Back out, so the planet basically has no insulation none, but. 239 00:12:12.480 --> 00:12:16.879 These engineered particles, specifically the aluminum rods, are physically sized 240 00:12:16.919 --> 00:12:21.360 at eight microns long and sixteen nanimeters wide to exploit 241 00:12:21.399 --> 00:12:25.480 that exact wavelength disparity. How their physical dimensions make them 242 00:12:25.559 --> 00:12:28.879 virtually invisible to the incoming short wave sunlight. The four 243 00:12:29.000 --> 00:12:32.440 hundred and animeter light waves essentially diffract right around the 244 00:12:32.480 --> 00:12:35.320 incredibly narrow sixteen nimeters cross section of the. 245 00:12:35.320 --> 00:12:37.879 Rods, so the sunlight just slips past. 246 00:12:37.600 --> 00:12:40.240 Them right The sunlight passes right through the aerosol layer 247 00:12:40.279 --> 00:12:43.879 and hits the surface. However, when that long wave ten 248 00:12:43.960 --> 00:12:47.360 micron thermal infrared radiation tries to rise back up from 249 00:12:47.399 --> 00:12:50.720 the warm surface, it encounters a completely different interaction. 250 00:12:51.000 --> 00:12:54.480 Oh, the eight micron length of the rod is almost 251 00:12:54.519 --> 00:12:57.279 the exact same size as the ten micron wavelength of 252 00:12:57.279 --> 00:12:58.120 the heat trying to. 253 00:12:58.159 --> 00:13:01.440 Escape, precisely because The odd is conductive aluminum, and its 254 00:13:01.480 --> 00:13:04.519 length roughly matches the wavelength of the thermal radiation. It 255 00:13:04.559 --> 00:13:06.360 acts as a microscopic dipole. 256 00:13:06.039 --> 00:13:07.960 Antenna and antenna. That's wild. 257 00:13:08.240 --> 00:13:11.240 When the long wave infrared photon hits the rod, it 258 00:13:11.320 --> 00:13:14.360 excites the conduction electrons along the length of the metal, 259 00:13:14.559 --> 00:13:16.720 creating a localized resonance. 260 00:13:16.399 --> 00:13:17.840 So it absorbs the heat. 261 00:13:18.120 --> 00:13:21.480 The rod absorbs the photon's energy and immediately scatters it, 262 00:13:21.759 --> 00:13:24.919 effectively bouncing the heat back down toward the surface rather 263 00:13:25.000 --> 00:13:27.879 than letting it escape to space. Wow. Yeah, they have 264 00:13:27.919 --> 00:13:32.080 a drastically stronger interaction with thermal infrared than with visible sunlight. 265 00:13:32.200 --> 00:13:34.759 So to use an analogy, we aren't just putting up 266 00:13:34.799 --> 00:13:37.960 a physical wall. We are creating a high tech one 267 00:13:38.000 --> 00:13:41.440 way thermal blanket around the entire planet, or a. 268 00:13:41.399 --> 00:13:42.799 Mirror, yes, a thermal mirror. 269 00:13:43.000 --> 00:13:45.919 The mirror lets the short wave solar heat come in freely, 270 00:13:46.320 --> 00:13:49.000 but when the planet tries to radiate that heat away 271 00:13:49.120 --> 00:13:52.440 as long wave energy, the microscopic antennas catch it and 272 00:13:52.559 --> 00:13:53.480 bounce it back down. 273 00:13:54.000 --> 00:13:57.399 That is the exact mechanism. You are fundamentally changing the 274 00:13:57.480 --> 00:14:01.159 rules of how energy moves through the Martian thermodynamic system. 275 00:14:01.279 --> 00:14:02.480 It's so elegant. 276 00:14:02.559 --> 00:14:06.919 It is a sustained systemic alteration of the planet's radiative balance. 277 00:14:07.720 --> 00:14:11.440 And here's a crucial detail regarding the engineering parameters these 278 00:14:11.440 --> 00:14:14.600 specific particle shapes and materials. The two hundred and fifty 279 00:14:14.679 --> 00:14:18.799 nanimeters graphene discs and the eight micron aluminum rods. They 280 00:14:18.840 --> 00:14:21.519 were not even perfectly optimized for warming yet in these 281 00:14:21.519 --> 00:14:23.039 initial computational models. 282 00:14:23.200 --> 00:14:25.399 Wait, really, they could be better. 283 00:14:25.679 --> 00:14:30.600 Yes, the researcher simply picked strong known candidates to prove 284 00:14:30.679 --> 00:14:34.519 the underlying physics of the concept. The incredible thermal results 285 00:14:34.519 --> 00:14:37.480 we are about to discuss don't even represent the absolute 286 00:14:37.519 --> 00:14:39.039 upper limit of potential heating. 287 00:14:39.240 --> 00:14:40.000 That's crazy. 288 00:14:40.200 --> 00:14:44.320 Material scientists further tune the geometry, the aspect ratio, and 289 00:14:44.360 --> 00:14:48.799 the composition of these aerosols, this scattering efficiency could increase significantly. 290 00:14:48.919 --> 00:14:51.600 That is a fascinating caveat We are looking at baseline 291 00:14:51.600 --> 00:14:54.600 proof of concept numbers, But having the idea for a 292 00:14:54.639 --> 00:14:58.559 microscopic antenna is one thing, right. Predicting how trillions of 293 00:14:58.600 --> 00:15:02.480 these particles will behave across an entire planetary atmosphere is another, 294 00:15:02.759 --> 00:15:06.559 Because historically didn't previous scientific models look at aerosol warming 295 00:15:06.600 --> 00:15:09.360 and determine it was like too inefficient to work. 296 00:15:09.519 --> 00:15:13.080 They did, but those historical models were hobbled by their 297 00:15:13.120 --> 00:15:18.159 computational limitations. They were overly simplistic. Well, earlier models analyzing 298 00:15:18.200 --> 00:15:22.559 aerosol distribution essentially assumed that if you release these particles, 299 00:15:22.600 --> 00:15:27.759 they would instantly form a static, unchanging, perfectly even layer 300 00:15:28.240 --> 00:15:29.399 across the entire. 301 00:15:29.200 --> 00:15:34.000 Sky, like installing a rigid glass dome over the planet. Yes, exactly, 302 00:15:34.039 --> 00:15:36.120 like a glass dome, which makes no sense because an 303 00:15:36.159 --> 00:15:40.759 atmosphere isn't a solid object. It's a fluid. It's constantly churning, mixing, 304 00:15:40.919 --> 00:15:44.759 rising and falling based on temperature and pressure differentially exactly. 305 00:15:45.279 --> 00:15:48.840 The earlier static models were useful for basic proofer concept 306 00:15:48.919 --> 00:15:52.360 mathematics regarding radiative transfer, but they could not tell you 307 00:15:52.440 --> 00:15:55.559 if the intervention would actually function in a real turbulent 308 00:15:55.600 --> 00:15:56.720 planetary environment. 309 00:15:56.879 --> 00:15:59.080 And this is the pivot point of the new research. 310 00:15:59.080 --> 00:16:01.639 Here's where it gets really interesting, because this is where 311 00:16:01.639 --> 00:16:03.000 the model's caught up with the theory. 312 00:16:03.320 --> 00:16:07.720 They move from a static idealized assumption to a highly 313 00:16:07.759 --> 00:16:11.559 sophisticated three dimensional global dynamic model. 314 00:16:11.320 --> 00:16:13.840 And the defining feature of this new simulation is a 315 00:16:13.840 --> 00:16:17.600 computational technique called plume tracking. Let's dig into what plume 316 00:16:17.639 --> 00:16:19.759 tracking actually means for the average listener. 317 00:16:20.080 --> 00:16:24.039 Right, So, plume tracking is the computational ability to follow 318 00:16:24.080 --> 00:16:28.120 the movement and dynamical behavior of the engineered aerosols over time. 319 00:16:28.200 --> 00:16:29.279 Within a fluid system. 320 00:16:29.440 --> 00:16:32.799 You aren't just magically teleporting a uniform layer of particles 321 00:16:32.840 --> 00:16:34.120 into the upper atmosphere. 322 00:16:34.200 --> 00:16:38.200 No, in reality, you are releasing them from specific localized 323 00:16:38.279 --> 00:16:43.080 point sources on the surface like factories, perhaps industrial atmospheric processors, 324 00:16:43.120 --> 00:16:44.440 station near the equator or. 325 00:16:44.440 --> 00:16:45.519 The poles Okay. 326 00:16:45.559 --> 00:16:48.480 And then what the three D model calculates exactly how 327 00:16:48.519 --> 00:16:51.799 those specific particles are lofted into the air by local 328 00:16:51.840 --> 00:16:55.279 thermal updrafts, and then how they are caught and carried 329 00:16:55.320 --> 00:16:59.879 globally by massive Martian atmospheric currents like the Hadleys. 330 00:17:00.440 --> 00:17:04.559 Wow. So it turns a sterile mathematical equation into a living, 331 00:17:04.680 --> 00:17:07.839 breathing weather model. It calculates the actual wind. 332 00:17:08.000 --> 00:17:10.200 Yes, the wind dynamics are fully integrated. 333 00:17:10.359 --> 00:17:12.880 And what I found so compelling is how it simulates 334 00:17:12.920 --> 00:17:15.519 what they call radiative dynamical feedbacks. 335 00:17:15.680 --> 00:17:18.759 What's fascinating here is that those feedbacks are the engine 336 00:17:18.759 --> 00:17:20.319 of the entire process right. 337 00:17:20.440 --> 00:17:23.720 Because as the particles trap heat, they artificially change the 338 00:17:23.720 --> 00:17:25.559 temperature of the air immediately around. 339 00:17:25.240 --> 00:17:27.680 Them, and warmer air expands. 340 00:17:27.200 --> 00:17:31.000 And rises exactly which changes the local air pressure. Changes 341 00:17:31.000 --> 00:17:34.160 in air pressure create new wind currents, which then grab 342 00:17:34.200 --> 00:17:37.200 the particles and move them further around the planet, spreading 343 00:17:37.200 --> 00:17:38.160 the heat even more. 344 00:17:38.720 --> 00:17:41.839 The fluid dynamics reveal that the atmosphere itself does the 345 00:17:41.880 --> 00:17:45.599 heavy lifting. You don't need to engineer a fleet of 346 00:17:45.720 --> 00:17:50.079 ten thousand specialized aircraft to fly all over Mars evenly, 347 00:17:50.160 --> 00:17:51.599 dusting the sky day and night. 348 00:17:51.839 --> 00:17:53.279 The wind does the work for you. 349 00:17:53.440 --> 00:17:57.160 The planet's own convective currents naturally distribute the thermal blanket. 350 00:17:57.319 --> 00:18:00.759 You introduce the aerosols at key strategic locations, and the 351 00:18:00.839 --> 00:18:04.480 induced thermal gradients create the very winds that spread them globally. 352 00:18:04.720 --> 00:18:08.400 But wait, Mars isn't a pristine empty wind tunnel. Mars 353 00:18:08.480 --> 00:18:11.319 already has massive amounts of dust in its sky. I mean, 354 00:18:11.319 --> 00:18:13.960 we've all seen the rover pictures of the hazy red horizon. 355 00:18:14.200 --> 00:18:17.880 Very true, How can a model confidently predict how microscopic 356 00:18:17.960 --> 00:18:21.039 aluminum antennas will behave if they are constantly smashing into 357 00:18:21.119 --> 00:18:22.759 naturally occurring Martian dust. 358 00:18:23.000 --> 00:18:25.839 That is a critical variable, and it is precisely why 359 00:18:25.880 --> 00:18:28.400 the researchers didn't model the aerosols in a vacuum. 360 00:18:28.559 --> 00:18:30.240 They included the dust yes. 361 00:18:31.000 --> 00:18:35.240 To make the simulation as realistic as computationally possible, they 362 00:18:35.359 --> 00:18:39.480 integrated a time varying background of natural Martian dust into 363 00:18:39.519 --> 00:18:40.480 the three D model. 364 00:18:40.640 --> 00:18:43.440 Because natural dust traps heat too, right, natural. 365 00:18:43.200 --> 00:18:47.359 Dust also interacts radiatively with sunlight and heat. It absorbs 366 00:18:47.359 --> 00:18:51.799 some energy, blocks some visible light, and emits its own infrared. 367 00:18:51.440 --> 00:18:54.640 Radiation, So they had to calculate the thermal interference of 368 00:18:54.680 --> 00:18:58.119 the natural dust fighting against the engineered particles exactly. 369 00:18:58.400 --> 00:19:01.799 They utilized a massive op servational database compiled from a 370 00:19:01.839 --> 00:19:06.400 relatively storm free period on Mars to understand precisely how 371 00:19:06.480 --> 00:19:10.319 these new artificial aerosols would interact with the natural, messy 372 00:19:10.480 --> 00:19:12.279 thermal environment of the planet. 373 00:19:12.079 --> 00:19:13.559 That is incredibly thorough. 374 00:19:13.640 --> 00:19:17.400 By integrating the natural dost cycles, the complex local topography 375 00:19:17.440 --> 00:19:20.680 of mountains and deep craters, the changing seasons, and the 376 00:19:20.680 --> 00:19:24.279 fluid dynamics of plume tracking well, they established a highly 377 00:19:24.359 --> 00:19:25.640 credible simulation. 378 00:19:25.279 --> 00:19:27.359 A simulation of what would actually happen if we flip 379 00:19:27.400 --> 00:19:30.359 the switch on this technology today. Yes, which naturally brings 380 00:19:30.440 --> 00:19:32.640 us to the most pressing question for anyone listening to 381 00:19:32.680 --> 00:19:37.000 this the timeline. The timeline the model is brilliant. The 382 00:19:37.039 --> 00:19:40.519 physics of the aluminum antennas check out the fluid dynamics 383 00:19:40.720 --> 00:19:43.559 show the wind will spread them. So if we actually 384 00:19:43.680 --> 00:19:45.880 land the machines on Mars, load them up with the 385 00:19:45.880 --> 00:19:49.359 aluminum nanorods, and turn the system on, how long does 386 00:19:49.400 --> 00:19:51.799 it actually take to see a return on this investment. 387 00:19:51.960 --> 00:19:53.440 That's the million dollar question. 388 00:19:53.319 --> 00:19:56.599 Because the prevailing assumption regarding terraforming is that it is 389 00:19:56.640 --> 00:20:00.240 a multi generational project. People assume we were taught talking 390 00:20:00.279 --> 00:20:03.400 about thousands or tens of thousands of years to even 391 00:20:03.440 --> 00:20:04.920 begin seeing frost melts. 392 00:20:04.960 --> 00:20:08.160 That has always been the baseline assumption. Yes, but the 393 00:20:08.200 --> 00:20:13.880 timeline revealed by this dynamic model is shockingly, almost unbelievably fast. 394 00:20:13.960 --> 00:20:16.480 Let's walk exactly through the timeline and their release rates 395 00:20:16.480 --> 00:20:19.039 proposed in the simulation. Because the numbers sound like a 396 00:20:19.079 --> 00:20:22.079 typo at first, clan, you really do. The model specifically 397 00:20:22.119 --> 00:20:25.640 focused on the continuous atmospheric release of three liters per 398 00:20:25.680 --> 00:20:30.200 second of these ir active aluminum particles. Let's pause and 399 00:20:30.279 --> 00:20:34.359 visualize that volume three lids per second, not a lot, No, 400 00:20:34.960 --> 00:20:37.920 that is roughly the flow rate of a standard residential 401 00:20:37.960 --> 00:20:41.279