WEBVTT 00:00:00.000 --> 00:00:02.520 Usually, when we look at the physical world, 00:00:02.700 --> 00:00:04.379 we just kind of trust our eyes, right? I mean, 00:00:04.740 --> 00:00:07.059 we see a staircase and we assume it goes up to 00:00:07.059 --> 00:00:08.960 a higher floor or, you know, down to a lower 00:00:08.960 --> 00:00:11.919 one. Right, yeah. We expect the geometry of our 00:00:11.919 --> 00:00:14.480 everyday lives to follow these strict, predictable, 00:00:14.980 --> 00:00:17.839 really comforting rules. Exactly. Gravity pulls 00:00:17.839 --> 00:00:21.179 things down. parallel lines never meet, and a 00:00:21.179 --> 00:00:23.739 staircase definitely doesn't just loop back on 00:00:23.739 --> 00:00:26.219 itself in some endless, impossible cycle. We 00:00:26.219 --> 00:00:29.640 desperately want our reality to be solidly logical. 00:00:29.780 --> 00:00:31.739 I mean, it's how we navigate the world without 00:00:31.739 --> 00:00:34.359 constantly questioning our sanity. But then, 00:00:34.719 --> 00:00:36.899 you tilt your head. You look at things from a 00:00:36.899 --> 00:00:39.780 slightly skewed, unconventional angle, and suddenly, 00:00:40.179 --> 00:00:42.060 that comforting logic just completely fractures. 00:00:42.079 --> 00:00:44.380 He falls apart. Right. You realize that sometimes 00:00:44.380 --> 00:00:47.399 the most impossible paradoxical shapes aren't 00:00:47.399 --> 00:00:50.460 just parlor tricks. They are the actual blueprints 00:00:50.460 --> 00:00:53.719 of the universe. And no one in modern history 00:00:53.719 --> 00:00:56.479 has understood those impossible blueprints better 00:00:56.479 --> 00:00:59.140 than Sir Roger Penrose. Oh, absolutely not. No 00:00:59.140 --> 00:01:02.380 one even comes close. So today's deep dive is 00:01:02.380 --> 00:01:04.859 all about the joy of intellectual rebellion. 00:01:05.319 --> 00:01:08.870 We are synthesizing the life. the work, and the 00:01:08.870 --> 00:01:11.790 frankly staggering mind of a man who takes all 00:01:11.790 --> 00:01:14.609 those comforting rules of reality and turns them 00:01:14.609 --> 00:01:17.530 entirely inside out. And in doing so, he manages 00:01:17.530 --> 00:01:20.390 to effortlessly bridge the gap between, like, 00:01:20.510 --> 00:01:22.930 optical illusions, the crushing mathematical 00:01:22.930 --> 00:01:25.569 certainty of black holes, the origins of the 00:01:25.569 --> 00:01:28.129 cosmos, and even the deepest, most persistent 00:01:28.129 --> 00:01:30.349 mysteries of human consciousness. Okay, let's 00:01:30.349 --> 00:01:32.689 unpack this because I am in sheer awe of this 00:01:32.689 --> 00:01:35.489 man's range. It's wild, isn't it? It is. He was 00:01:35.489 --> 00:01:38.790 born in August 1931, making him 94 years old 00:01:38.790 --> 00:01:41.189 today. He's a philosopher, a prolific author, 00:01:41.430 --> 00:01:44.530 a 2020 Nobel laureate in physics. But at his 00:01:44.530 --> 00:01:46.670 core, he approaches the universe like a geometer 00:01:46.670 --> 00:01:48.750 looking for hidden patterns. Yeah, that's the 00:01:48.750 --> 00:01:50.250 perfect way to put it. And honestly, looking 00:01:50.250 --> 00:01:53.010 at how he grew up, that unique perspective almost 00:01:53.010 --> 00:01:55.329 feels, I don't know, inevitable. He was born 00:01:55.329 --> 00:01:57.349 into a household that was essentially collision 00:01:57.349 --> 00:01:59.980 of hard science and fine art. That background 00:01:59.980 --> 00:02:02.480 is the skeleton key to understanding his entire 00:02:02.480 --> 00:02:05.299 career, really, because his father, Lionel, was 00:02:05.299 --> 00:02:07.680 a geneticist and a psychiatrist. His mother, 00:02:07.879 --> 00:02:10.400 Margaret, was a physician. But then you have 00:02:10.400 --> 00:02:13.060 his uncle, Roland, who was a really prominent 00:02:13.060 --> 00:02:16.719 artist. So from day one, Penrose was surrounded 00:02:16.719 --> 00:02:19.360 by this environment where the rigorous scientific 00:02:19.360 --> 00:02:22.020 method was treated with the exact same reverence 00:02:22.020 --> 00:02:25.360 as creative visual expression. Which is such 00:02:25.360 --> 00:02:27.620 a rare environment for a kid, and he didn't just 00:02:27.620 --> 00:02:31.240 read dry textbooks. He devoured George Kamal's 00:02:31.240 --> 00:02:33.879 Mr. Tompkins books. Oh, those are classics. If 00:02:33.879 --> 00:02:35.520 you haven't read them, these are just brilliant 00:02:35.520 --> 00:02:38.180 stories that take the bizarre, mind -bending 00:02:38.180 --> 00:02:40.759 concepts of fundamental physics and turn them 00:02:40.759 --> 00:02:44.060 into magical, relatable narratives. Like, a guy 00:02:44.060 --> 00:02:46.979 rides a bicycle, but the speed of light is artificially 00:02:46.979 --> 00:02:49.819 lowered, so he physically experiences the distortion 00:02:49.819 --> 00:02:52.060 of space and time as he pedals. Right. It's not 00:02:52.060 --> 00:02:54.180 just equations on a chalkboard. It instilled 00:02:54.180 --> 00:02:57.360 this lifelong passion for understanding the fundamental 00:02:57.360 --> 00:03:00.520 machine of reality, not just as abstract math, 00:03:00.939 --> 00:03:02.819 but as something you can actually visualize. 00:03:03.259 --> 00:03:06.319 And that visual intuition culminated in a massive 00:03:06.319 --> 00:03:10.159 turning point in 1954. Penrose was a student. 00:03:10.500 --> 00:03:13.039 He was attending a conference in Amsterdam. And 00:03:13.039 --> 00:03:15.960 just by total chance, he wanders into an exhibition 00:03:15.960 --> 00:03:19.080 of work by the Dutch graphic artist MC Escher. 00:03:19.460 --> 00:03:21.759 Talk about a fateful meeting. Escher was already 00:03:21.759 --> 00:03:24.439 playing with perspective, right? Drawing environments 00:03:24.439 --> 00:03:27.240 that played tricks on the eye. Yeah. But Penrose 00:03:27.240 --> 00:03:29.900 looked at that art, and unlike most people who 00:03:29.900 --> 00:03:33.199 just saw a cool drawing, he saw underlying mathematics. 00:03:33.680 --> 00:03:36.099 He took that visual inspiration back home, sat 00:03:36.099 --> 00:03:38.800 down with his father, and they mathematically 00:03:38.800 --> 00:03:41.800 formalized it. They actually designed what became 00:03:41.800 --> 00:03:43.939 known as the tri -bar, or the Penrose Triangle. 00:03:44.020 --> 00:03:46.379 Yes, exactly. It's a triangle drawn in perspective 00:03:46.379 --> 00:03:48.560 that looks like a solid three -dimensional object 00:03:48.560 --> 00:03:51.379 made of intersecting beams. But when your eye 00:03:51.379 --> 00:03:54.460 actually traces the lines, it violates the fundamental 00:03:54.460 --> 00:03:57.060 rules of Euclidean geometry. The corners connect 00:03:57.060 --> 00:03:59.340 in ways that just cannot exist in physical three 00:03:59.340 --> 00:04:01.819 -dimensional space. Right. Penrose famously described 00:04:01.819 --> 00:04:04.520 it as impossibility in its purest form. But they 00:04:04.520 --> 00:04:06.860 didn't stop at the triangle either. They applied 00:04:06.860 --> 00:04:09.819 that exact same twisted logic face to design 00:04:09.819 --> 00:04:12.520 the Penrose Stairs. Oh, the endless staircase. 00:04:12.620 --> 00:04:15.439 Yeah, a staircase that continuously loops upward, 00:04:15.759 --> 00:04:18.519 yet somehow never gets any higher. And this is 00:04:18.519 --> 00:04:21.579 where a really beautiful, cyclical flow of creativity 00:04:21.579 --> 00:04:24.240 begins. Because Roger and his father wrote a 00:04:24.240 --> 00:04:26.180 formal paper on these impossible figures, and 00:04:26.180 --> 00:04:29.000 this is the best part. They mailed a copy directly 00:04:29.000 --> 00:04:31.839 to M .C. Escher. Which is such a wild flex. Like, 00:04:31.920 --> 00:04:34.240 hey, love your art. Here is the mathematical 00:04:34.240 --> 00:04:36.519 proof of why it literally breaks the universe. 00:04:36.699 --> 00:04:39.339 But Escher loved it. I mean, he took their impossible 00:04:39.339 --> 00:04:42.259 stairs and used them to create two of his most 00:04:42.259 --> 00:04:45.360 iconic masterpieces. Waterfall and ascending 00:04:45.360 --> 00:04:47.779 and descending. Exactly. It was this incredibly 00:04:47.779 --> 00:04:51.040 rare dialogue between pure abstract mathematics 00:04:51.040 --> 00:04:53.639 and visual art. What's fascinating here is how 00:04:53.639 --> 00:04:56.149 Penrose's mind works. Oh, wait. I guess still 00:04:56.149 --> 00:04:57.990 your line there. Well, what's fascinating here 00:04:57.990 --> 00:05:00.029 is to reclaim my thought how he doesn't just 00:05:00.029 --> 00:05:02.730 draw these things, you know, he solves the spatial 00:05:02.730 --> 00:05:05.709 limitations of reality. Fast forward a bit to 00:05:05.709 --> 00:05:08.709 1974. He introduces something called Penrose 00:05:08.709 --> 00:05:11.430 tilings, which sounds like a hobby. It does sound 00:05:11.430 --> 00:05:14.029 like a recreational math puzzle, but it actually 00:05:14.029 --> 00:05:15.870 solved a problem that geometers had struggled 00:05:15.870 --> 00:05:19.069 with for years. The question was, how do you 00:05:19.069 --> 00:05:21.449 tile an infinite plane without the pattern ever 00:05:21.449 --> 00:05:24.500 repeating? OK, let's make this concrete. Imagine 00:05:24.500 --> 00:05:27.240 you have to tile your bathroom floor. If you 00:05:27.240 --> 00:05:30.100 use standard square tiles, they naturally form 00:05:30.100 --> 00:05:33.240 a grid. The pattern repeats endlessly. Right, 00:05:33.459 --> 00:05:36.180 left to right, up and down. Even if you use hexagons, 00:05:36.360 --> 00:05:39.480 like a honeycomb, it repeats. The challenge was 00:05:39.480 --> 00:05:42.180 to cover an entire floor using a small number 00:05:42.180 --> 00:05:44.740 of shapes, but you are mathematically forbidden 00:05:44.740 --> 00:05:47.100 from letting the overarching pattern ever repeat. 00:05:47.420 --> 00:05:50.180 In geometry, this is called non -periodic tiling. 00:05:50.899 --> 00:05:53.689 To achieve it, Penrose stripped it down to just 00:05:53.689 --> 00:05:56.790 two very specific simple shapes, which are often 00:05:56.790 --> 00:05:58.829 referred to as kites and darts. Kites and darts, 00:05:58.949 --> 00:06:00.829 okay. Because of the specific angles of these 00:06:00.829 --> 00:06:03.230 shapes, they physically cannot form a simple 00:06:03.230 --> 00:06:05.769 repeating grid. The geometry forces the shapes 00:06:05.769 --> 00:06:08.189 to constantly change direction as they lock together. 00:06:08.350 --> 00:06:09.910 They just won't lay flat in a boring pattern. 00:06:10.120 --> 00:06:13.160 Exactly. It exhibits a five -fold rotational 00:06:13.160 --> 00:06:15.779 symmetry. That means if you rotate the entire 00:06:15.779 --> 00:06:18.680 infinite floor by 72 degrees, it looks exactly 00:06:18.680 --> 00:06:21.480 the same overall. But the local pattern of the 00:06:21.480 --> 00:06:24.519 tiles never ever repeats. It's beautiful, but 00:06:24.519 --> 00:06:26.360 for a long time everyone just thought it was 00:06:26.360 --> 00:06:29.060 a neat trick, right? Like a quirky mathematical 00:06:29.060 --> 00:06:32.120 abstraction. Until nature stepped in. Yeah, 10 00:06:32.120 --> 00:06:35.720 years later, in 1984, a material scientist named 00:06:35.720 --> 00:06:38.160 Dan Sheckman was looking through an electron 00:06:38.160 --> 00:06:41.420 microscope at a rapidly cooled metal alloy. And 00:06:41.420 --> 00:06:43.620 he discovered something that completely shocked 00:06:43.620 --> 00:06:46.120 the scientific community. Quasi -crystals. Quasi 00:06:46.120 --> 00:06:49.699 -crystals. The atomic arrangement of these natural 00:06:49.699 --> 00:06:53.579 physical alloys followed the exact non -periodic 00:06:53.579 --> 00:06:55.920 five -fold symmetry that Penrose had mapped out 00:06:55.920 --> 00:06:57.959 with his little kites and darts a decade earlier. 00:06:58.160 --> 00:07:00.360 That is just mind -blowing. The physical universe 00:07:00.360 --> 00:07:02.170 had been using his impossible blueprints all 00:07:02.170 --> 00:07:04.350 along. It basically proves that if you follow 00:07:04.350 --> 00:07:06.889 the geometry far enough, reality eventually catches 00:07:06.889 --> 00:07:08.930 up. Which brings us to the ultimate question 00:07:08.930 --> 00:07:12.149 of this deep dive. How do you take a brain wired 00:07:12.149 --> 00:07:15.250 to draw impossible triangles and infinite bathroom 00:07:15.250 --> 00:07:18.329 tiles and use it to prove the existence of impossible 00:07:18.329 --> 00:07:22.310 objects in deep space? Well, you take that exact 00:07:22.310 --> 00:07:24.970 same geometric intuition and you aim it straight 00:07:24.970 --> 00:07:27.449 at Albert Einstein's theory of general relativity. 00:07:27.870 --> 00:07:30.750 By the 1960s, general relativity had been the 00:07:30.750 --> 00:07:33.649 law of the land for decades. But the math of 00:07:33.649 --> 00:07:36.449 relativity is notoriously, brutally complex. 00:07:37.069 --> 00:07:39.990 To actually solve Einstein's equations and make 00:07:39.990 --> 00:07:42.490 them manageable, physicists at the time had to 00:07:42.490 --> 00:07:45.230 use highly idealized models. Yeah, they assumed 00:07:45.230 --> 00:07:48.189 perfectly symmetrical, smooth spheres of matter. 00:07:48.290 --> 00:07:50.430 Which don't exist. No, of course not. They were 00:07:50.430 --> 00:07:52.569 using explicit equations and perturbation theory. 00:07:52.750 --> 00:07:54.829 And under those perfectly smooth theoretical 00:07:54.829 --> 00:07:57.509 conditions, the math suggested something terrifying. 00:07:58.189 --> 00:08:00.310 It showed that if a massive star burned through 00:08:00.310 --> 00:08:02.470 its fuel and collapsed under its own gravity, 00:08:02.910 --> 00:08:05.029 it wouldn't just shrink into a tight, dense ball. 00:08:05.089 --> 00:08:07.290 It would collapse infinitely, down to a point 00:08:07.290 --> 00:08:10.089 of zero volume and infinite density, a singularity. 00:08:10.449 --> 00:08:13.329 But the real universe isn't a flawless mathematical 00:08:13.329 --> 00:08:17.079 model. Stars are incredibly messy. They spin 00:08:17.079 --> 00:08:19.620 violently. They bulge at the equator They have 00:08:19.620 --> 00:08:21.920 you know magnetic fields and uneven densities 00:08:21.920 --> 00:08:24.740 chaotic very chaotic and because of that messiness 00:08:24.740 --> 00:08:27.379 the prevailing thought among top physicists was 00:08:27.379 --> 00:08:30.420 that a Singularity was just a mathematical glitch 00:08:30.420 --> 00:08:33.159 just an artifact of assuming a perfect sphere 00:08:33.389 --> 00:08:36.710 The assumption was that in the messy real world, 00:08:37.090 --> 00:08:39.610 the collapsing matter of a dying star would just 00:08:39.610 --> 00:08:41.730 swirl around, miss the exact center, and kind 00:08:41.730 --> 00:08:43.690 of bounce back out. And Penrose looked at that 00:08:43.690 --> 00:08:46.009 assumption and just completely dismantled it 00:08:46.009 --> 00:08:49.470 in his revolutionary 1965 paper. It was called 00:08:49.470 --> 00:08:51.730 Gravitational Collapse and Spacetime Singularities. 00:08:51.970 --> 00:08:54.490 And the way he did it was brilliant. He didn't 00:08:54.490 --> 00:08:56.710 play their game. Exactly. He didn't try to solve 00:08:56.710 --> 00:08:59.370 the messy explicit equations of the swirling 00:08:59.370 --> 00:09:02.710 matter. He bypassed them entirely by using topology. 00:09:02.730 --> 00:09:05.210 Now, break down topology for a second. We aren't 00:09:05.210 --> 00:09:07.009 talking about topological maps of mountains here. 00:09:07.210 --> 00:09:10.230 No, no. Think about a subway map. The map on 00:09:10.230 --> 00:09:12.750 the wall of a train car doesn't show you the 00:09:12.750 --> 00:09:16.190 exact physical curves, the real distances, or 00:09:16.190 --> 00:09:18.629 the messy geological reality of the tunnels. 00:09:18.889 --> 00:09:21.269 It would be unreadable if it did. Right. It strips 00:09:21.269 --> 00:09:23.470 all that away and just shows you the connections. 00:09:23.769 --> 00:09:26.570 How does station A connect to station B? That's 00:09:26.570 --> 00:09:28.970 topology. It's the study of properties that are 00:09:28.970 --> 00:09:32.190 preserved through deformation. Penrose zoomed 00:09:32.190 --> 00:09:34.590 out and looked at the overarching topology of 00:09:34.590 --> 00:09:37.549 space -time itself. He realized that the messy 00:09:37.549 --> 00:09:40.370 details of the collapsing star just don't matter. 00:09:40.549 --> 00:09:42.450 He looked at the underlying subway map of the 00:09:42.450 --> 00:09:45.169 dying star. Exactly. He proved that once the 00:09:45.169 --> 00:09:47.570 star shrinks past a certain critical threshold 00:09:47.570 --> 00:09:50.389 this point, where gravity becomes so staggeringly 00:09:50.389 --> 00:09:52.730 intense that even light is dragged backward, 00:09:53.230 --> 00:09:55.490 all the tracks of space -time point inward. Why? 00:09:55.669 --> 00:09:57.629 It doesn't matter if the star is spinning or 00:09:57.629 --> 00:10:00.529 lumpy or magnetic. The geometry of space itself 00:10:00.529 --> 00:10:02.809 curves so violently that there are simply no 00:10:02.809 --> 00:10:05.710 outward paths left. The matter has literally 00:10:05.710 --> 00:10:08.929 nowhere to go but to a singularity. It is a robust, 00:10:09.210 --> 00:10:11.610 unavoidable prediction. Nothing in the physical 00:10:11.610 --> 00:10:14.409 universe can stop the collapse. And that changes 00:10:14.409 --> 00:10:17.389 astrophysics overnight. I mean, it led to Penrose 00:10:17.389 --> 00:10:19.470 proposing the cosmic censorship conjecture in 00:10:19.470 --> 00:10:23.370 1969. Yes. The idea that nature effectively censors 00:10:23.370 --> 00:10:25.929 these terrifying points of infinite density by 00:10:25.929 --> 00:10:28.860 cloaking them. The singularity is safely hidden 00:10:28.860 --> 00:10:31.159 behind a boundary where light can't escape an 00:10:31.159 --> 00:10:33.840 event horizon, which John Archibald Wheeler famously 00:10:33.840 --> 00:10:36.960 popularized as a black hole. But Penrose didn't 00:10:36.960 --> 00:10:40.000 just prove they had to exist. He started exploring 00:10:40.000 --> 00:10:43.220 their theoretical properties, which led to the 00:10:43.220 --> 00:10:46.039 Penrose process. OK, yes. He theorized a mechanism 00:10:46.039 --> 00:10:48.360 by which an advanced civilization could actually 00:10:48.360 --> 00:10:50.480 extract gravitational energy from a spinning 00:10:50.480 --> 00:10:53.370 black hole. And that massive body of work is 00:10:53.370 --> 00:10:56.029 exactly why he shared the 2020 Nobel Prize in 00:10:56.029 --> 00:10:58.230 Physics alongside Reinhard Genzel and Audrey 00:10:58.230 --> 00:11:00.590 Ghez. Now hold on, here's where it gets really 00:11:00.590 --> 00:11:02.809 interesting and honestly super counterintuitive. 00:11:03.110 --> 00:11:04.889 I have to push back on this energy extraction 00:11:04.889 --> 00:11:07.429 idea. Okay, go for it. A black hole is famously 00:11:07.429 --> 00:11:10.409 the ultimate cosmic roach motel. Things check 00:11:10.409 --> 00:11:13.870 in, they don't check out. Its gravity is so strong 00:11:13.870 --> 00:11:17.590 that absolutely nothing escapes. So how can anyone 00:11:17.850 --> 00:11:20.730 even theoretically extract energy out of an object 00:11:20.730 --> 00:11:23.029 whose defining characteristic is that it refuses 00:11:23.029 --> 00:11:25.230 to let anything leave. It sounds like a total 00:11:25.230 --> 00:11:28.700 paradox, I know. But it comes back to how a spinning 00:11:28.700 --> 00:11:31.700 black hole alters geometry. When a black hole 00:11:31.700 --> 00:11:34.659 spins, it doesn't just sit there in space. It 00:11:34.659 --> 00:11:37.220 literally drags the fabric of space time around 00:11:37.220 --> 00:11:39.960 with it. Like a whirlpool. Exactly like a whirlpool 00:11:39.960 --> 00:11:43.059 pulling water down a drain. The singularity is 00:11:43.059 --> 00:11:45.799 the drain, but the swirling water around it is 00:11:45.799 --> 00:11:48.600 a region just outside the event horizon. It's 00:11:48.600 --> 00:11:51.320 called the ergosphere. OK, so you have this swirling 00:11:51.320 --> 00:11:53.740 vortex of space time outside the actual point 00:11:53.740 --> 00:11:56.789 of no return. Right. Now imagine firing a into 00:11:56.789 --> 00:11:59.669 that swirling ergosphere at a very specific angle. 00:12:00.029 --> 00:12:02.250 The spacetime is moving so fast that it forces 00:12:02.250 --> 00:12:04.250 the projectile to move with it. It sweeps it 00:12:04.250 --> 00:12:07.190 up. Yeah. And if you trigger the projectile to 00:12:07.190 --> 00:12:10.169 split in two right inside the ergosphere, shooting 00:12:10.169 --> 00:12:12.409 one half backward toward the black hole and the 00:12:12.409 --> 00:12:15.429 other half forward, the geometry does something 00:12:15.429 --> 00:12:19.009 incredible. The half that escapes can actually 00:12:19.009 --> 00:12:22.169 steal some of the rotational energy of the swirling 00:12:22.169 --> 00:12:25.580 spacetime. Wait, really? Yes. The escaping piece 00:12:25.580 --> 00:12:28.460 leaves with more energy than the original unbroken 00:12:28.460 --> 00:12:30.919 projectile had when it went in. So you're throwing 00:12:30.919 --> 00:12:33.879 trash into the whirlpool, but the act of throwing 00:12:33.879 --> 00:12:36.159 it kicks a piece back at you faster than you 00:12:36.159 --> 00:12:38.620 threw it? That's the physics of it. He took the 00:12:38.620 --> 00:12:41.440 most terrifying astrophysical object in the universe 00:12:41.440 --> 00:12:44.059 and treated it like a geometric battery. But 00:12:44.059 --> 00:12:46.850 Pinrose wasn't finished. I mean, if his math 00:12:46.850 --> 00:12:49.090 dictates how matter collapses at the end of a 00:12:49.090 --> 00:12:51.629 star's life into a singularity, it was really 00:12:51.629 --> 00:12:53.789 only a matter of time before he turned that geometric 00:12:53.789 --> 00:12:56.470 lens backward toward the ultimate singularity. 00:12:56.570 --> 00:12:59.129 The Big Bang itself. The Big Bang itself. But, 00:12:59.370 --> 00:13:01.970 true to form, he refuses to accept the standard 00:13:01.970 --> 00:13:04.730 narrative. He refuses to believe the singularity 00:13:04.730 --> 00:13:07.049 of the Big Bang is simply the beginning of everything. 00:13:07.789 --> 00:13:10.629 In his 2010 book, Cycles of Time, he outlines 00:13:10.629 --> 00:13:14.750 conformal cyclic cosmology, or CCC. Yes. And 00:13:14.750 --> 00:13:17.490 it is a complete reimagining of the timeline 00:13:17.490 --> 00:13:20.710 of reality. In standard cosmology, our universe 00:13:20.710 --> 00:13:23.129 started with the Big Bang, it's currently expanding, 00:13:23.289 --> 00:13:25.830 and it will eventually suffer a heat death. Right, 00:13:25.970 --> 00:13:27.750 the big freeze. Yeah, everything gets further 00:13:27.750 --> 00:13:30.590 apart, stars burn out, and the universe just 00:13:30.590 --> 00:13:33.730 fades away into a cold, dark, infinite void. 00:13:34.549 --> 00:13:37.230 Penrose accepts that expansion, but he follows 00:13:37.230 --> 00:13:40.190 the physics to its absolute infinite mathematical 00:13:40.190 --> 00:13:43.009 extreme. He assumes that over unimaginable time 00:13:43.009 --> 00:13:45.509 scales, all matters eventually captured and eaten 00:13:45.509 --> 00:13:47.929 by black holes. But black holes aren't eternal 00:13:47.929 --> 00:13:50.950 either, right? Stephen Hawking proved that they 00:13:50.950 --> 00:13:53.450 slowly leak energy over time through Hawking 00:13:53.450 --> 00:13:57.049 radiation. Exactly. So. Trillions upon trillions 00:13:57.049 --> 00:13:58.990 of years in the future, even the supermassive 00:13:58.990 --> 00:14:00.990 black holes will evaporate. They just pop out 00:14:00.990 --> 00:14:03.309 of existence eventually. They do. So what remains? 00:14:03.549 --> 00:14:06.110 You are left with an infinitely large, incredibly 00:14:06.110 --> 00:14:09.190 cold universe that contains absolutely no mass. 00:14:09.710 --> 00:14:11.809 The only things left are massless particles, 00:14:12.269 --> 00:14:15.409 primarily particles of light. Photons. And this 00:14:15.409 --> 00:14:17.509 is the part of CCC that just breaks my brain. 00:14:18.330 --> 00:14:21.129 Think about the physics of a photon. Because 00:14:21.129 --> 00:14:24.439 they travel exactly at the speed of light, Relativity 00:14:24.439 --> 00:14:26.519 dictates that they do not experience time or 00:14:26.519 --> 00:14:28.700 space in the way we do. Right, a photon doesn't 00:14:28.700 --> 00:14:31.720 wear a wristwatch. I love that. From the perspective 00:14:31.720 --> 00:14:34.580 of a photon, the moment it is emitted from a 00:14:34.580 --> 00:14:37.679 dying star and the moment it hits your eye happens 00:14:37.679 --> 00:14:40.580 simultaneously, even if it just crossed the entire 00:14:40.580 --> 00:14:43.259 universe over billions of years. And because 00:14:43.259 --> 00:14:46.080 this future universe is populated entirely by 00:14:46.080 --> 00:14:48.440 particles that do not experience space or time, 00:14:48.799 --> 00:14:51.440 the concepts of large and small lose all physical 00:14:51.440 --> 00:14:53.700 meaning. There's no scale anymore. No. There 00:14:53.700 --> 00:14:56.240 are no rulers left to measure distance and no 00:14:56.240 --> 00:14:59.399 clocks left to measure time. Mathematically speaking, 00:14:59.759 --> 00:15:02.860 a cold, infinitely expanded, empty universe consisting 00:15:02.860 --> 00:15:05.899 only of photons becomes geometrically identical 00:15:05.899 --> 00:15:09.019 to an infinitely small, infinitely dense, hot 00:15:09.019 --> 00:15:12.460 singularity. The end of our universe is mathematically 00:15:12.460 --> 00:15:15.100 indistinguishable from the Big Bang. It just 00:15:15.100 --> 00:15:17.740 becomes the spark for the next universe. I like 00:15:17.740 --> 00:15:19.879 to think of it like an old school arcade video 00:15:19.879 --> 00:15:22.480 game, like Pac -Man or Asteroids. Yeah, that's 00:15:22.480 --> 00:15:24.700 a great analogy. When your little ship flies 00:15:24.700 --> 00:15:27.860 off the absolute far edge of the screen, it doesn't 00:15:27.860 --> 00:15:30.299 disappear into an infinite void outside your 00:15:30.299 --> 00:15:32.820 television. It wraps around the geometry of the 00:15:32.820 --> 00:15:35.500 game and instantly reappears at the beginning 00:15:35.500 --> 00:15:38.139 on the exact opposite side of the screen. If 00:15:38.139 --> 00:15:40.240 we connect this to the bigger picture, this is 00:15:40.240 --> 00:15:43.600 a massive intellectual swing. Most physicists 00:15:43.600 --> 00:15:46.320 believe that to understand the Big Bang, we need 00:15:46.320 --> 00:15:49.279 to unify general relativity with quantum mechanics 00:15:49.279 --> 00:15:51.779 into a theory of quantum gravity. The holy grail 00:15:51.779 --> 00:15:55.080 of physics. Right. But doing so often leads to 00:15:55.080 --> 00:15:57.539 brutal equations like the Wheeler -DeWitt equation, 00:15:57.899 --> 00:16:00.840 which effectively erase the concept of time altogether. 00:16:01.519 --> 00:16:04.250 Penrose bypasses this completely. By changing 00:16:04.250 --> 00:16:06.330 the mathematical perspective, he removes the 00:16:06.330 --> 00:16:08.970 Big Bang's singularity and preserves a continuous 00:16:08.970 --> 00:16:11.769 flow of time through endless eons or cycles. 00:16:12.149 --> 00:16:13.629 And he didn't just write a book about it. He 00:16:13.629 --> 00:16:15.909 went looking for evidence. He and his colleagues 00:16:15.909 --> 00:16:19.190 analyzed data from the WMAP satellite, the Wilkinson 00:16:19.190 --> 00:16:21.669 Microwave Anisotropy Probe, which mapped the 00:16:21.669 --> 00:16:24.210 cosmic microwave background radiation left over 00:16:24.210 --> 00:16:25.830 from the Big Bang. Yeah, looking for ghosts, 00:16:25.850 --> 00:16:28.610 essentially. He claims to have found concentric 00:16:28.610 --> 00:16:31.370 rings of uniform temperature in this data. He 00:16:31.370 --> 00:16:33.809 argues these rings are the fossilized ripples 00:16:33.809 --> 00:16:36.830 of supermassive black hole collisions from the 00:16:36.830 --> 00:16:39.389 previous universe bleeding through the Big Bang 00:16:39.389 --> 00:16:41.870 into our current cycle. It's highly controversial, 00:16:41.870 --> 00:16:44.549 of course. The vast majority of cosmologists 00:16:44.549 --> 00:16:47.509 dispute his interpretation of that WMAP data, 00:16:47.909 --> 00:16:50.110 arguing those patterns could just be random noise. 00:16:50.490 --> 00:16:53.110 But it proves his ultimate methodology, you know? 00:16:53.509 --> 00:16:55.730 Follow the geometric logic wherever it leads, 00:16:56.049 --> 00:16:58.110 even if it points to a ghost universe before 00:16:58.110 --> 00:17:00.710 our own. Okay, so we have an endless cyclical 00:17:00.710 --> 00:17:03.710 universe governed by the mind -bending geometry 00:17:03.710 --> 00:17:06.190 of relativity and quantum mechanics. But here's 00:17:06.190 --> 00:17:08.920 the ultimate philosophical question. How does 00:17:08.920 --> 00:17:11.619 a collection of wet atoms sitting inside a human 00:17:11.619 --> 00:17:14.140 skull actually know that it is inside a universe? 00:17:14.339 --> 00:17:16.539 Right, the observer. Once again, Penrose takes 00:17:16.539 --> 00:17:19.460 a sharp left turn. He points his geometric lens 00:17:19.460 --> 00:17:22.319 inward to the greatest mystery of them all, consciousness. 00:17:22.720 --> 00:17:25.500 This takes us to his 1989 book, The Emperor's 00:17:25.500 --> 00:17:28.319 New Mind. At a time when artificial intelligence 00:17:28.319 --> 00:17:31.720 was gaining massive theoretical traction, Penrose 00:17:31.720 --> 00:17:34.960 planted a flag. He argued that known classical 00:17:34.960 --> 00:17:37.759 physics cannot explain human consciousness. He 00:17:37.759 --> 00:17:40.180 went completely against the grain. Totally. His 00:17:40.180 --> 00:17:43.160 core argument is that human thought is deterministic, 00:17:43.640 --> 00:17:46.980 but it is fundamentally non -algorithmic. Let's 00:17:46.980 --> 00:17:49.740 slow down and break that apart because non -algorithmic 00:17:49.740 --> 00:17:52.500 is the linchpin here. An algorithm is just a 00:17:52.500 --> 00:17:54.460 set of instructions. It's an if this, then that 00:17:54.460 --> 00:17:57.019 machine. Yeah. Computers run strictly on algorithms. 00:17:57.660 --> 00:18:00.480 But Penrose argues our minds do something fundamentally 00:18:00.480 --> 00:18:03.160 different. and he uses Alan Turing's Halting 00:18:03.160 --> 00:18:05.579 Theorem and Kurt Gödel's Incompleteness Theorem 00:18:05.579 --> 00:18:09.079 to prove it. Gödel's Incompleteness Theorem is 00:18:09.079 --> 00:18:11.619 devastating to the idea of a purely mathematical 00:18:11.619 --> 00:18:14.740 brain. Gödel proved that in any logical mathematical 00:18:14.740 --> 00:18:16.680 system there are true statements that can never 00:18:16.680 --> 00:18:19.259 actually be proven using the rules of that specific 00:18:19.259 --> 00:18:20.900 system. Let me stop you there because that is 00:18:20.900 --> 00:18:23.059 wild. If you give a computer algorithm one of 00:18:23.059 --> 00:18:24.900 those unprovable statements, what does it do? 00:18:25.049 --> 00:18:28.390 It freezes, or it gets stuck in an infinite loop 00:18:28.390 --> 00:18:30.970 trying to process the logic, because an algorithm 00:18:30.970 --> 00:18:33.009 cannot step outside of its programming. It just 00:18:33.009 --> 00:18:36.269 crashes. Basically. But a human mathematician 00:18:36.269 --> 00:18:39.589 can look at that exact same unprovable statement, 00:18:40.009 --> 00:18:42.890 step outside the rigid rules of the system, and 00:18:42.890 --> 00:18:45.890 use intuition and insight to simply realize that 00:18:45.890 --> 00:18:48.930 the statement is true. We can see the forest 00:18:48.930 --> 00:18:51.670 while the algorithm is doomed to spend eternity 00:18:51.670 --> 00:18:53.670 inspecting the bark of a single tree. That's 00:18:53.670 --> 00:18:56.019 a beautiful way to say it. Penrose argues that 00:18:56.019 --> 00:18:59.200 this ability to transcend formal logic proves 00:18:59.200 --> 00:19:01.480 that human consciousness cannot just be a complex 00:19:01.480 --> 00:19:03.940 computer program. There must be some physical 00:19:03.940 --> 00:19:07.160 process happening inside the brain that is fundamentally 00:19:07.160 --> 00:19:09.880 non -computable. And since classical, everyday 00:19:09.880 --> 00:19:12.420 physics is largely computable, he argues the 00:19:12.420 --> 00:19:15.579 answer must lie in the microscopic realm, specifically 00:19:15.579 --> 00:19:17.960 the gap between quantum mechanics and general 00:19:17.960 --> 00:19:20.420 relativity. To find a biological mechanism for 00:19:20.420 --> 00:19:22.779 this, he teamed up with an anesthesiologist named 00:19:22.779 --> 00:19:25.599 Stuart Hamroff. Together, they developed the 00:19:25.599 --> 00:19:28.819 Orch -Or theory, orchestrated objective reduction. 00:19:28.920 --> 00:19:31.640 Yeah, Orch -Or. They hypothesized that consciousness 00:19:31.640 --> 00:19:34.740 arises from tiny structural tubes within our 00:19:34.740 --> 00:19:37.380 brain cells called microtubules. Orchestrated 00:19:37.380 --> 00:19:39.539 objective reduction. What does objective reduction 00:19:39.539 --> 00:19:43.019 actually mean in plain English? Oh, right. Well, 00:19:43.259 --> 00:19:45.509 in standard quantum mechanics, Particles can 00:19:45.509 --> 00:19:48.109 exist in multiple states at once, a superposition, 00:19:48.670 --> 00:19:51.029 until they are observed or interact with the 00:19:51.029 --> 00:19:53.170 environment, causing that state to collapse. 00:19:53.329 --> 00:19:56.049 Right. Schrodinger's cat stuff. Exactly. Penrose 00:19:56.049 --> 00:19:58.730 argues that gravity is involved. He theorizes 00:19:58.730 --> 00:20:01.089 that the tiny separations of mass in these quantum 00:20:01.089 --> 00:20:04.730 states curve spacetime in microscopic ways. Eventually, 00:20:04.849 --> 00:20:06.970 the difference in geometry becomes too unstable, 00:20:07.470 --> 00:20:09.769 and spacetime itself forces the quantum state 00:20:09.769 --> 00:20:13.200 to collapse or reduce. objectively. Every time 00:20:13.200 --> 00:20:15.519 this objective reduction happens in our microtubules, 00:20:16.000 --> 00:20:17.940 it creates a microscopic moment of conscious 00:20:17.940 --> 00:20:20.599 awareness. So what does this all mean? I have 00:20:20.599 --> 00:20:22.700 to offer some serious critical pushback here. 00:20:22.720 --> 00:20:25.240 Please do. Is it possible that Penrose is just 00:20:25.240 --> 00:20:27.039 taking the two things we understand the least 00:20:27.039 --> 00:20:29.619 in the entire universe, human consciousness and 00:20:29.619 --> 00:20:32.059 quantum gravity, and mashing them together simply 00:20:32.059 --> 00:20:35.059 because they are both profoundly mysterious? 00:20:35.400 --> 00:20:37.779 That is exactly what his critics said. I mean, 00:20:38.079 --> 00:20:40.039 Marvin Minsky, one of the founding fathers of 00:20:40.039 --> 00:20:42.799 artificial intelligence, vehemently rejected 00:20:42.799 --> 00:20:45.480 Penrose's theory. Minsky believed humans are 00:20:45.480 --> 00:20:49.230 just incredibly complex meat machines. He felt 00:20:49.230 --> 00:20:51.509 Penrose was hunting for mystical principles of 00:20:51.509 --> 00:20:54.630 physics when the answer was just basic classical 00:20:54.630 --> 00:20:57.410 biology. And the pushback wasn't just philosophical, 00:20:57.589 --> 00:21:01.609 it was intensely mathematical. Max Tegmark, a 00:21:01.609 --> 00:21:04.069 brilliant physicist, published a paper taking 00:21:04.069 --> 00:21:06.630 aim at the physics of the brain. He calculated 00:21:06.630 --> 00:21:09.170 that the human brain is simply too warm, wet, 00:21:09.349 --> 00:21:12.130 and noisy to maintain delicate quantum states. 00:21:12.269 --> 00:21:14.450 Right, a quantum computer needs to be near absolute 00:21:14.450 --> 00:21:18.130 zero. Exactly. Tegmark calculated the decoherence 00:21:18.130 --> 00:21:20.309 time, the time it takes for a fragile quantum 00:21:20.309 --> 00:21:22.690 state to collapse into regular classical physics, 00:21:23.049 --> 00:21:25.750 and found it was too fast by a factor of 10 billion. 00:21:25.869 --> 00:21:28.269 10 billion? Yeah. The quantum state would collapse 00:21:28.269 --> 00:21:30.289 before the brain could ever use it to think. 00:21:30.710 --> 00:21:33.390 For a long time, Tegmark's calculation was widely 00:21:33.390 --> 00:21:36.549 cited as the death knell for Orchard. It seemed 00:21:36.549 --> 00:21:39.509 biologically impossible. But, you know, science 00:21:39.509 --> 00:21:42.690 is never static. In 2014, a researcher named 00:21:42.690 --> 00:21:46.250 Anirban Bandyapadhai discovered actual quantum 00:21:46.250 --> 00:21:49.349 vibrations inside microtubules at room temperature. 00:21:49.569 --> 00:21:52.349 Wait, at room temperature? Yes. It completely 00:21:52.349 --> 00:21:54.650 shocked the biological community and offered 00:21:54.650 --> 00:21:57.890 potential... though still fiercely debated, support 00:21:57.890 --> 00:22:00.869 for Penrose and Hameroff's theory. It's an ongoing, 00:22:01.190 --> 00:22:03.809 ferocious debate. It is. But this raises an important 00:22:03.809 --> 00:22:06.289 question, regardless of whether the Orchard Theory 00:22:06.289 --> 00:22:10.029 is perfectly correct in its current form. Penrose's 00:22:10.029 --> 00:22:12.710 view, even as a minority opinion in neuroscience, 00:22:13.329 --> 00:22:15.630 forces us to deeply question the foundational 00:22:15.630 --> 00:22:18.009 assumptions of strong artificial intelligence. 00:22:18.069 --> 00:22:20.250 He really does. It challenges the Silicon Valley 00:22:20.250 --> 00:22:22.410 dogma that if we just build a big enough, fast 00:22:22.410 --> 00:22:24.769 enough computer algorithm, true consciousness 00:22:24.779 --> 00:22:27.180 will miraculously spark into existence. Which 00:22:27.180 --> 00:22:29.500 brings this entire exploration back to you listening 00:22:29.500 --> 00:22:32.400 to this and your daily life. Why does the work 00:22:32.400 --> 00:22:34.819 of an astrophysicist sketching impossible triangles 00:22:34.819 --> 00:22:37.799 matter? It matters because Penrose is the ultimate 00:22:37.799 --> 00:22:39.940 champion of being an intellectual generalist. 00:22:40.079 --> 00:22:42.640 Yes. He shows us that the biggest breakthroughs 00:22:42.640 --> 00:22:45.039 in human understanding rarely come from staying 00:22:45.039 --> 00:22:47.539 safely inside your designated lane. They come 00:22:47.539 --> 00:22:50.140 from combining disciplines. He combined visual 00:22:50.140 --> 00:22:52.960 art with recreational puzzles, merged those with 00:22:52.960 --> 00:22:55.700 the geometry of astrophysics, and then collided 00:22:55.700 --> 00:22:58.759 that entirely new framework with neurobiology. 00:22:59.259 --> 00:23:02.059 Strict specialization creates blinders. And it 00:23:02.059 --> 00:23:04.700 leaves us with a deeply philosophical perspective. 00:23:05.440 --> 00:23:08.339 Penrose considers himself an agnostic, devoid 00:23:08.339 --> 00:23:11.480 of established religious belief. But in 1991, 00:23:11.799 --> 00:23:14.279 he explicitly stated that he does not believe 00:23:14.279 --> 00:23:16.799 the universe is just here by chance. He refuses 00:23:16.799 --> 00:23:18.779 to believe it's just blindly computing along 00:23:18.779 --> 00:23:20.900 and we accidentally woke up inside of it. He 00:23:20.900 --> 00:23:22.619 fundamentally believes there is a deeper purpose 00:23:22.619 --> 00:23:25.839 to reality, woven into the very geometry of space 00:23:25.839 --> 00:23:29.000 and time. And he spent a lifetime giving us the 00:23:29.000 --> 00:23:31.819 mathematical tools to try and perceive that geometry, 00:23:32.319 --> 00:23:33.960 even if the ultimate purpose is still out of 00:23:33.960 --> 00:23:36.740 reach. So I want to leave you with a final provocative 00:23:36.740 --> 00:23:39.059 thought to mull over. Let's assume Penrose is 00:23:39.059 --> 00:23:41.819 entirely right. Let's say true human consciousness 00:23:41.819 --> 00:23:45.200 requires non -algorithmic quantum gravity processes 00:23:45.200 --> 00:23:49.319 occurring in our biology. Meanwhile, every AI 00:23:49.319 --> 00:23:51.910 model we are currently building is strictly based 00:23:51.910 --> 00:23:55.349 on algorithms. What happens in the near future 00:23:55.349 --> 00:23:58.130 when we inevitably build a highly advanced quantum 00:23:58.130 --> 00:24:01.690 computer that can perfectly physically simulate 00:24:01.690 --> 00:24:04.210 the quantum vibrations of the microtubules in 00:24:04.210 --> 00:24:07.829 a human brain? Would we accidentally build a 00:24:07.829 --> 00:24:10.950 machine with a genuine soul? Or would we just 00:24:10.950 --> 00:24:13.150 create the universe's most convincing mathematically 00:24:13.150 --> 00:24:16.250 perfect zombie? That really forces you to reconsider 00:24:16.250 --> 00:24:18.490 the mechanics of your own mind. Exactly. Just 00:24:18.490 --> 00:24:20.549 like stepping onto a staircase expecting it to 00:24:20.549 --> 00:24:22.690 go up. Only to find you've been walking in an 00:24:22.690 --> 00:24:25.109 infinite beautiful loop all along. Keep wandering, 00:24:25.329 --> 00:24:26.630 keep tilting your head, and we'll catch you on 00:24:26.630 --> 00:24:27.029 the next one.