WEBVTT 00:00:00.000 --> 00:00:03.600 You know, you look up at a towering, dark storm 00:00:03.600 --> 00:00:07.580 cloud, flashing with lightning, and you're actually 00:00:07.580 --> 00:00:10.160 looking at a high -energy physics laboratory. 00:00:10.179 --> 00:00:12.140 It's pretty wild to think about. Right, because 00:00:12.140 --> 00:00:15.160 hidden inside the chaos of a severe thunderstorm, 00:00:15.880 --> 00:00:19.300 nature is actively manufacturing the most explosive, 00:00:19.399 --> 00:00:22.179 most expensive, and frankly, most sci -fi -sounding 00:00:22.179 --> 00:00:24.019 substance in the universe. Yeah, right over your 00:00:24.019 --> 00:00:26.640 head. Exactly. It sounds entirely like the premise 00:00:26.640 --> 00:00:29.440 of some summer blockbuster, but antimatter is 00:00:29.289 --> 00:00:33.149 And in this deep dive, our mission is to, you 00:00:33.149 --> 00:00:35.670 know, strip away those sci -fi tropes. Which 00:00:35.670 --> 00:00:38.170 there are a lot of. Oh, totally. We're looking 00:00:38.170 --> 00:00:40.689 at a huge compilation of sources today to understand 00:00:40.689 --> 00:00:43.950 the actual hard science of antimatter. Because 00:00:43.950 --> 00:00:46.390 it might just explain why you, me, and, well, 00:00:46.429 --> 00:00:48.409 the entire universe aren't just an endless void 00:00:48.409 --> 00:00:50.929 of nothingness. Yeah, I mean, it is arguably 00:00:50.929 --> 00:00:53.210 the most profound existential question we have 00:00:53.210 --> 00:00:55.530 in physics. Why anything exists at all. Right. 00:00:55.670 --> 00:00:58.090 To understand why the universe exists, we have 00:00:58.090 --> 00:01:00.689 to look... really closely at a substance that 00:01:00.689 --> 00:01:03.549 literally annihilates itself the moment it interacts 00:01:03.549 --> 00:01:06.049 with, well, anything else. Okay, let's unpack 00:01:06.049 --> 00:01:08.290 this physically first because I think people 00:01:08.290 --> 00:01:11.109 hear antimatter and they assume, you know, it 00:01:11.109 --> 00:01:14.430 has negative mass or that it's some exotic glowing 00:01:14.430 --> 00:01:16.750 energy field. Like in Star Trek or something. 00:01:16.890 --> 00:01:19.989 Yeah, exactly. But at a microscopic level, it's 00:01:19.989 --> 00:01:22.430 actually incredibly mundane in its structure, 00:01:22.489 --> 00:01:25.549 isn't it? Very mundane. At the subatomic level, 00:01:25.689 --> 00:01:28.680 an antimatter particle is just a mere image of 00:01:28.680 --> 00:01:31.420 an ordinary matter particle. It possesses the 00:01:31.420 --> 00:01:34.920 exact same mass. It behaves the exact same way. 00:01:35.939 --> 00:01:38.180 The fundamental difference is that it carries 00:01:38.180 --> 00:01:41.879 the exact opposite electric charge. So if we 00:01:41.879 --> 00:01:44.680 take an electron, the tiny negatively charged 00:01:44.680 --> 00:01:47.519 particle orbiting an atom, its antimatter counterpart 00:01:47.519 --> 00:01:49.400 would still weigh the exact same amount. Yep, 00:01:49.640 --> 00:01:51.799 identical mass. But it would carry a positive 00:01:51.799 --> 00:01:54.140 charge. Precisely. We call that a positron. A 00:01:54.140 --> 00:01:58.189 positron, OK. A proton, which sits in the nucleus 00:01:58.189 --> 00:02:00.730 of an atom and carries a positive charge, has 00:02:00.730 --> 00:02:03.109 an antimatter counterpart called an antiproton. 00:02:03.329 --> 00:02:05.510 Which is perfectly negatively charged. Exactly. 00:02:05.549 --> 00:02:07.629 They are perfectly balanced counterparts to the 00:02:07.629 --> 00:02:10.210 building blocks of our reality. Which means they 00:02:10.210 --> 00:02:12.710 also respond to gravity the exact same way, right? 00:02:12.750 --> 00:02:14.310 Because they know for decades there was this 00:02:14.310 --> 00:02:18.449 lingering theory that antimatter might have anti 00:02:18.449 --> 00:02:20.770 -gravity properties. Oh yeah, the idea that it 00:02:20.770 --> 00:02:22.969 fell up. Right, like if you drop an anti -apple 00:02:22.969 --> 00:02:26.039 it would just float away into space, but... Recent 00:02:26.039 --> 00:02:28.939 experiments at CERN finally put that to bed. 00:02:29.099 --> 00:02:32.699 They did, specifically with the LOVA -G experiment 00:02:32.699 --> 00:02:35.379 in 2023. What's fascinating here is that you 00:02:35.379 --> 00:02:38.039 can't just, you know, drop antimatter on a table 00:02:38.039 --> 00:02:39.919 to see what happens. Because it would destroy 00:02:39.919 --> 00:02:41.960 the table. Right, the table, the lab, all of 00:02:41.960 --> 00:02:45.639 it. So physicists trapped a thin, ultracold gas 00:02:45.639 --> 00:02:48.639 of anti -hydrogen atoms in a vertical magnetic 00:02:48.639 --> 00:02:50.900 shaft. Kind of like an invisible tube. Yeah, 00:02:50.939 --> 00:02:53.120 an invisible tube of magnetic fields to hold 00:02:53.120 --> 00:02:56.250 the antimatter in a pure vacuum. Then they slowly 00:02:56.250 --> 00:02:58.449 weaken the magnetic fields at the top and bottom 00:02:58.449 --> 00:02:59.909 of the tube. To see which way it would fall? 00:03:00.129 --> 00:03:01.729 Exactly. They just watched to see which way the 00:03:01.729 --> 00:03:03.789 antimatter would escape. And it fell down. It 00:03:03.789 --> 00:03:06.310 obeyed Earth's gravity identically to normal 00:03:06.310 --> 00:03:09.650 hydrogen. It fell down. It has mass, so space 00:03:09.650 --> 00:03:11.729 -time bends around it just like regular matter. 00:03:12.330 --> 00:03:15.370 But the catch is what happens when that mass 00:03:15.370 --> 00:03:18.030 interacts with normal matter. Right, the annihilation 00:03:18.030 --> 00:03:21.129 part. Yeah. When an electron and a positron touch 00:03:21.129 --> 00:03:23.770 or, you know, a proton and an antiproton, they 00:03:23.770 --> 00:03:26.169 undergo a process called annihilation. And this 00:03:26.169 --> 00:03:28.069 is the part that sounds like pure science fiction. 00:03:28.210 --> 00:03:30.129 Let's explain the mechanism there, because it's 00:03:30.129 --> 00:03:33.169 not just an explosion like dynamite. It's a fundamental 00:03:33.169 --> 00:03:35.330 conversion of reality, isn't it? It really is. 00:03:35.449 --> 00:03:38.169 Think about Einstein's famous equation, E equals 00:03:38.169 --> 00:03:41.219 MC squared. Energy equals mass times the speed 00:03:41.219 --> 00:03:43.699 of light squared. Right. That equation tells 00:03:43.699 --> 00:03:46.180 us that mass and energy are essentially the same 00:03:46.180 --> 00:03:49.340 thing. I mean, mass is just highly concentrated, 00:03:49.539 --> 00:03:52.020 congealed energy. OK, I like that visual, congealed 00:03:52.020 --> 00:03:54.680 energy. So when you burn wood, or even when you 00:03:54.680 --> 00:03:58.199 split an atom in a nuclear reactor, you're only 00:03:58.199 --> 00:04:01.560 uncongealing a tiny, tiny fraction of that mass 00:04:01.560 --> 00:04:04.639 into energy. You're always left with ash or radioactive 00:04:04.639 --> 00:04:07.960 waste or whatever. Exactly. But with annihilation, 00:04:08.300 --> 00:04:10.979 the matter and antimatter perfectly cancel each 00:04:10.979 --> 00:04:14.039 other's physical structure out. 100 % of their 00:04:14.039 --> 00:04:17.240 mass is uncongealed. Wow. It leaves behind zero 00:04:17.240 --> 00:04:20.620 physical residue. The entire mass of both particles 00:04:20.620 --> 00:04:23.980 is converted instantly into pure energy. Usually 00:04:23.980 --> 00:04:27.579 as, what, gamma rays? Gamma rays and fast -moving 00:04:27.579 --> 00:04:30.620 elusive particles called neutrinos, yeah. It 00:04:30.620 --> 00:04:33.360 is the ultimate, perfectly efficient reaction. 00:04:33.470 --> 00:04:36.110 Okay, so if the reaction is that perfectly efficient 00:04:36.110 --> 00:04:38.389 and they always destroy each other on contact, 00:04:38.589 --> 00:04:41.730 this brings us to a glaring cosmic contradiction. 00:04:41.850 --> 00:04:44.389 The big one. If the math of the Big Bang suggests 00:04:44.389 --> 00:04:46.750 the universe started by creating equal amounts 00:04:46.750 --> 00:04:49.610 of both matter and antimatter, we shouldn't be 00:04:49.610 --> 00:04:51.949 here. We absolutely shouldn't. This is known 00:04:51.949 --> 00:04:54.170 in physics as the matter -antimatter asymmetry 00:04:54.170 --> 00:04:56.490 problem. Barygenesis, right? Yes. It deals with 00:04:56.490 --> 00:04:58.750 a phase in the early universe called barygenesis. 00:04:59.269 --> 00:05:01.110 In the first fraction of a second of the Big 00:05:01.110 --> 00:05:04.470 Bang, the universe was, well, unfathomably hot 00:05:04.470 --> 00:05:06.750 and dense. It was a boiling soup of pure energy. 00:05:06.949 --> 00:05:09.949 Just E equals MC squared going crazy. Exactly. 00:05:10.449 --> 00:05:13.069 That energy was constantly congealing into matter 00:05:13.069 --> 00:05:15.689 -antimatter pairs. And those pairs were constantly 00:05:15.689 --> 00:05:17.790 crashing back together and annihilating back 00:05:17.790 --> 00:05:20.189 into energy. Just a perfectly balanced cycle 00:05:20.189 --> 00:05:22.889 of creation and destruction. But as the universe 00:05:22.889 --> 00:05:26.470 rapidly expanded, it cooled down. The energy 00:05:26.470 --> 00:05:28.990 stretched out. So it wasn't hot enough to spontaneously 00:05:28.990 --> 00:05:31.550 forge new particles anymore. Right. Which means 00:05:31.550 --> 00:05:34.660 the music stopped. Every particle of matter should 00:05:34.660 --> 00:05:36.839 have found an antimatter partner in that crowded 00:05:36.839 --> 00:05:39.019 soup, and they all should have annihilated each 00:05:39.019 --> 00:05:41.600 other one last time. Meaning the universe should 00:05:41.600 --> 00:05:44.040 have been completely empty of physical matter. 00:05:44.279 --> 00:05:47.660 No stars, no planets, no dust. Just an infinite 00:05:47.660 --> 00:05:50.360 expanding void filled with drifting faux ponds 00:05:50.360 --> 00:05:52.600 of light. But I mean, we're sitting here having 00:05:52.600 --> 00:05:54.879 a conversation on a rock floating around a giant 00:05:54.879 --> 00:05:57.279 ball of plasma, so the scales must have been 00:05:57.279 --> 00:06:00.040 tipped. Nature must have cheated somehow to let 00:06:00.040 --> 00:06:03.360 normal matter survive. Nature did cheat. Physicists 00:06:03.360 --> 00:06:06.339 call this cheat CP violation. Charge parity violation. 00:06:06.540 --> 00:06:08.660 Right. In physics, there's this assumption of 00:06:08.660 --> 00:06:11.519 symmetry. If you take a physical process, flip 00:06:11.519 --> 00:06:14.220 the electric charges. That's the C. And flip 00:06:14.220 --> 00:06:16.079 the spatial coordinates like looking in a mirror. 00:06:16.100 --> 00:06:18.740 That's the P. The laws of physics should operate 00:06:18.740 --> 00:06:22.079 exactly the same way. Exactly. A mirrored, oppositely 00:06:22.079 --> 00:06:25.040 charged universe should tick like the exact same 00:06:25.040 --> 00:06:28.759 clock. But in the 1960s, researchers discovered 00:06:28.759 --> 00:06:32.560 that certain exotic particles didn't obey this 00:06:32.560 --> 00:06:34.879 symmetry perfectly. They decayed into normal 00:06:34.879 --> 00:06:37.259 matter just slightly more often than they decayed 00:06:37.259 --> 00:06:39.879 into antimatter. Yes. The universe essentially 00:06:39.879 --> 00:06:42.920 showed a microscopic favoritism. During the Big 00:06:42.920 --> 00:06:46.079 Bang, for every one billion antimatter particles 00:06:46.079 --> 00:06:49.439 created, there were one billion and one normal 00:06:49.439 --> 00:06:52.139 matter particles. Wait. One actual particle of 00:06:52.139 --> 00:06:55.620 matter for every billion pairs. That is a staggeringly 00:06:55.620 --> 00:06:57.500 tiny margin of victory. It is mathematically 00:06:57.500 --> 00:07:00.060 microscopic. Those billion pairs found each other 00:07:00.060 --> 00:07:02.259 and annihilated, filling the background of the 00:07:02.259 --> 00:07:05.220 universe with energy. And that single leftover 00:07:05.220 --> 00:07:07.600 unpaired particle of normal matter survived. 00:07:07.720 --> 00:07:09.839 Oh, wow. So everything we see in the cosmos today, 00:07:09.939 --> 00:07:12.040 every galaxy, every black hole, every cell in 00:07:12.040 --> 00:07:14.459 your body, is constructed entirely from that 00:07:14.459 --> 00:07:17.220 tiny statistical rounding error. The entire physical 00:07:17.220 --> 00:07:19.939 universe is just the cosmic debris of an ancient 00:07:19.939 --> 00:07:24.850 war. That is mind -blowing. But let me push back 00:07:24.850 --> 00:07:27.470 on something. If that ancient antimatter was 00:07:27.470 --> 00:07:30.170 completely wiped out nearly 14 billion years 00:07:30.170 --> 00:07:33.410 ago, how are we finding it in modern thunderstorms? 00:07:33.410 --> 00:07:35.790 Ah, because while the primordial antimatter is 00:07:35.790 --> 00:07:38.509 gone, the fundamental mechanics of the universe 00:07:38.509 --> 00:07:41.639 haven't changed. extreme energy can still convert 00:07:41.639 --> 00:07:44.759 into mass. Like in severe thunderstorms. Right. 00:07:44.779 --> 00:07:46.879 You have massive electric fields building up 00:07:46.879 --> 00:07:49.360 between the clouds. These fields are so intense 00:07:49.360 --> 00:07:51.279 they act like natural particle accelerators. 00:07:51.319 --> 00:07:53.519 They just grab stuttery electrons and whip them 00:07:53.519 --> 00:07:55.959 up to speeds approaching the speed of light. 00:07:56.139 --> 00:07:59.639 Yes. And when an electron moving that fast smashes 00:07:59.639 --> 00:08:02.819 into the nucleus of, say, a nitrogen or oxygen 00:08:02.819 --> 00:08:05.680 atom in the air, the impact is just huge. The 00:08:05.680 --> 00:08:08.220 kinetic energy of that collision is so massive 00:08:08.220 --> 00:08:10.810 that it literally snaps into a physical form, 00:08:11.089 --> 00:08:13.949 creating an electron and a positron pair. A terrestrial 00:08:13.949 --> 00:08:16.750 gamma ray flag. Exactly. Satellites in orbit 00:08:16.750 --> 00:08:19.009 designed to look at deep space astrophysics kept 00:08:19.009 --> 00:08:21.610 detecting blinding flashes of gamma radiation 00:08:21.610 --> 00:08:23.910 coming from Earth. And it turned out they were 00:08:23.910 --> 00:08:27.290 detecting the annihilation signature of positrons 00:08:27.290 --> 00:08:30.769 being born and dying instantly inside hurricane 00:08:30.769 --> 00:08:33.210 level storm clouds. It's incredible that this 00:08:33.210 --> 00:08:36.190 highly complex physics is just happening casually 00:08:36.190 --> 00:08:38.269 in the sky above us. It really is. Every time 00:08:38.269 --> 00:08:40.710 you look up at a storm, there's a tiny matter 00:08:40.710 --> 00:08:43.149 anti -matter war happening. And it's not just 00:08:43.149 --> 00:08:45.309 storms, right? Our sources mentioned you can 00:08:45.309 --> 00:08:48.250 find it in your kitchen. You can, yeah. Radioactive 00:08:48.250 --> 00:08:50.990 decay is another natural factory. Potassium 40. 00:08:51.080 --> 00:08:53.460 which is a naturally occurring isotope found 00:08:53.460 --> 00:08:56.620 in things like bananas. Bananas, of course. Yeah, 00:08:56.679 --> 00:08:59.360 it undergoes a specific type of decay where a 00:08:59.360 --> 00:09:02.480 proton in its nucleus converts into a neutron, 00:09:02.840 --> 00:09:05.519 and in the process, it spits out a positron. 00:09:05.820 --> 00:09:08.240 So a banana on my counter is periodically shooting 00:09:08.240 --> 00:09:10.539 out a microscopic piece of antimatter. Which 00:09:10.539 --> 00:09:12.340 then immediately hits an electron in the air 00:09:12.340 --> 00:09:14.740 and annihilates. That's wild. And if we look 00:09:14.740 --> 00:09:17.000 beyond our atmosphere... the natural factories 00:09:17.000 --> 00:09:19.480 get much larger. Cosmic rays, you know, high 00:09:19.480 --> 00:09:22.059 energy protons from deep space are constantly 00:09:22.059 --> 00:09:24.799 slamming into Earth's upper atmosphere, showering 00:09:24.799 --> 00:09:27.850 the sky with fleeting antiparticles. I read that 00:09:27.850 --> 00:09:30.389 Earth's magnetic field actually acts like a giant 00:09:30.389 --> 00:09:32.929 net for them, the Van Allen radiation belts. 00:09:33.049 --> 00:09:35.509 Right. Because antiprotons have a negative charge, 00:09:35.769 --> 00:09:37.789 they get caught in the magnetic field lines. 00:09:37.990 --> 00:09:40.590 Just endlessly spiraling around the Earth until 00:09:40.590 --> 00:09:44.070 they hit a stray gas molecule. Yeah. And if you 00:09:44.070 --> 00:09:46.149 look toward the center of the Milky Way galaxy, 00:09:46.889 --> 00:09:49.549 orbiting observatories have mapped a massive 00:09:49.549 --> 00:09:52.529 asymmetrical cloud of antimatter. Is that from 00:09:52.529 --> 00:09:54.409 black holes? That's the leading theory, yeah. 00:09:54.450 --> 00:09:57.830 Yeah. incredibly dense stellar remnants like 00:09:57.830 --> 00:10:01.269 neutron stars and black holes devouring ordinary 00:10:01.269 --> 00:10:03.690 matter. And as that matter falls in and heats 00:10:03.690 --> 00:10:06.769 up to millions of degrees, the energy creates 00:10:06.769 --> 00:10:10.090 jets of positron electron plasma blasted out 00:10:10.090 --> 00:10:12.389 into deep space. But, you know, natural phenomena 00:10:12.389 --> 00:10:14.690 aren't exactly convenient for researchers. I 00:10:14.690 --> 00:10:16.909 mean, we can't fly a scoop into a thunderstorm 00:10:16.909 --> 00:10:19.110 or park a satellite near a black hole to harvest 00:10:19.110 --> 00:10:21.610 positrons. No, we definitely cannot. So if humans 00:10:21.610 --> 00:10:23.129 are going to study this, we had to figure out 00:10:23.129 --> 00:10:25.610 how to make it ourselves. Which is a story that 00:10:25.610 --> 00:10:27.490 actually starts purely on a chalkboard, doesn't 00:10:27.490 --> 00:10:30.789 it? It does. With an English physicist named 00:10:30.789 --> 00:10:34.350 Paul Dirac in 1928, Dirac was trying to solve 00:10:34.350 --> 00:10:36.529 a massive mathematical headache. He wanted to 00:10:36.529 --> 00:10:38.669 write an equation for an electron. Right. But 00:10:38.669 --> 00:10:41.090 he needed it to satisfy two completely different 00:10:41.090 --> 00:10:44.350 realms of physics. Quantum mechanics, which deals 00:10:44.350 --> 00:10:46.970 with very small things, and Einstein's special 00:10:46.970 --> 00:10:48.990 relativity, which deals with very fast things. 00:10:49.389 --> 00:10:51.809 So he was trying to track a tiny quantum particle 00:10:51.809 --> 00:10:54.639 moving at near light speed. Precisely. And when 00:10:54.639 --> 00:10:57.019 he finally formulated this relativistic wave 00:10:57.019 --> 00:10:59.659 equation, the math did something unexpected. 00:11:00.279 --> 00:11:02.919 Think of a simple algebra problem, like x squared 00:11:02.919 --> 00:11:05.919 equals 4. The answer is 2. Right. But the math 00:11:05.919 --> 00:11:08.340 also allows for a negative 2, because negative 00:11:08.340 --> 00:11:10.919 2 times negative 2 is also 4. OK, I see where 00:11:10.919 --> 00:11:13.019 this is going. Dirac's equation for the energy 00:11:13.019 --> 00:11:15.639 of an electron spit out a positive solution. 00:11:15.789 --> 00:11:18.190 and a negative solution. And rather than just 00:11:18.190 --> 00:11:21.169 tossing the negative solution out as like a mathematical 00:11:21.169 --> 00:11:24.350 glitch, he realized the math was pointing to 00:11:24.350 --> 00:11:26.669 a physical reality. He essentially predicted 00:11:26.669 --> 00:11:29.070 antimatter four years before anyone actually 00:11:29.070 --> 00:11:31.590 saw it. He predicted a particle with the exact 00:11:31.590 --> 00:11:35.470 same mass, but opposite charge. Exactly. And 00:11:35.470 --> 00:11:38.830 then in 1932, An American physicist named Carl 00:11:38.830 --> 00:11:42.250 Anderson was studying tracks made by cosmic rays 00:11:42.250 --> 00:11:45.429 in a cloud chamber and saw a particle curving 00:11:45.429 --> 00:11:48.029 the wrong way in a magnetic field. It had the 00:11:48.029 --> 00:11:50.570 mass of an electron but a positive charge. The 00:11:50.570 --> 00:11:53.519 positron was real. Okay, but finding a positron 00:11:53.519 --> 00:11:56.860 from a cosmic ray is one thing. Creating complex 00:11:56.860 --> 00:11:59.500 antimatter, like actual anti -hydrogen atoms 00:11:59.500 --> 00:12:02.559 in a lab, requires essentially replicating the 00:12:02.559 --> 00:12:04.820 Big Bang on a small scale. Which is why we rely 00:12:04.820 --> 00:12:07.220 on massive particle accelerator facilities like 00:12:07.220 --> 00:12:09.940 CERN in Switzerland. They accelerate normal protons 00:12:09.940 --> 00:12:13.639 to 99 .99 % the speed of light and just smash 00:12:13.639 --> 00:12:15.659 them into a block of metal. Again, we're using 00:12:15.659 --> 00:12:18.759 E equals MC squared in reverse. The sheer kinetic 00:12:18.759 --> 00:12:21.159 energy of that collision condenses into new particles. 00:12:21.129 --> 00:12:24.029 and a very, very small fraction of those happen 00:12:24.029 --> 00:12:26.509 to be antiprotons. But then you run into the 00:12:26.509 --> 00:12:28.470 ultimate engineering nightmare. Here's where 00:12:28.470 --> 00:12:30.769 it gets really interesting. You've just created 00:12:30.769 --> 00:12:33.230 a particle that will obliterate itself and part 00:12:33.230 --> 00:12:35.129 of your machine if it touches the wall of the 00:12:35.129 --> 00:12:36.970 container. Or the floor of the room. Or even 00:12:36.970 --> 00:12:39.850 a single stray molecule of oxygen in the air. 00:12:40.269 --> 00:12:42.549 How do you bottle a substance that destroys the 00:12:42.549 --> 00:12:45.240 bottle? You use its charge against it. Because 00:12:45.240 --> 00:12:47.960 antiprotons and positrons carry an electric charge, 00:12:48.299 --> 00:12:50.820 they can be manipulated by magnetic fields. The 00:12:50.820 --> 00:12:52.740 Penning traps. Let's visualize this, because 00:12:52.740 --> 00:12:55.200 it's not a physical box. It's like trying to 00:12:55.200 --> 00:12:58.179 keep a furious, invisible ghost inside a cage 00:12:58.179 --> 00:13:01.490 made entirely of wind. I like that analogy. Think 00:13:01.490 --> 00:13:04.049 about holding two strong magnets. If you try 00:13:04.049 --> 00:13:07.070 to push the identical north poles together, you 00:13:07.070 --> 00:13:10.090 feel this invisible, furious resistance pushing 00:13:10.090 --> 00:13:12.330 your hands apart. Yeah, that squishy, repelling 00:13:12.330 --> 00:13:14.690 feeling. Right. A penning trap surrounds the 00:13:14.690 --> 00:13:17.289 antimatter with custom -shaped, superconducting 00:13:17.289 --> 00:13:20.009 electromagnets. The magnetic field pushes inward 00:13:20.009 --> 00:13:22.610 from all sides simultaneously. So the antimatter 00:13:22.610 --> 00:13:25.009 is essentially floating on a bed of invisible 00:13:25.009 --> 00:13:27.669 magnetic springs. Hovering in a vacuum chamber 00:13:27.669 --> 00:13:30.110 completely empty of normal matter. Trapped in 00:13:30.110 --> 00:13:32.990 a cage of magnetic wind. And if the power fails, 00:13:33.169 --> 00:13:35.409 the magnetic wind dies, the antimatter drifts 00:13:35.409 --> 00:13:37.990 into the steel wall of the chamber, and the whole 00:13:37.990 --> 00:13:41.429 laboratory has a very bad day. It instantly annihilates, 00:13:41.629 --> 00:13:44.690 yes. It is an incredible technological tightrope 00:13:44.690 --> 00:13:47.539 walk. But capturing them is only half the battle. 00:13:48.039 --> 00:13:49.860 Really? Yeah, when these antiprotons are created 00:13:49.860 --> 00:13:52.279 in the accelerator, they are incredibly hot. 00:13:52.620 --> 00:13:55.220 And in physics, heat is just speed. So they're 00:13:55.220 --> 00:13:57.879 moving too fast to be studied. Far too fast. 00:13:58.059 --> 00:14:00.120 And definitely too fast to be combined with a 00:14:00.120 --> 00:14:02.080 positron to make antihydrogens. So you have to 00:14:02.080 --> 00:14:04.419 slow them down. You have to cool them to just 00:14:04.419 --> 00:14:07.139 a fraction of a degree above absolute zero. And 00:14:07.139 --> 00:14:09.919 researchers do this using a technique similar 00:14:09.919 --> 00:14:11.940 to how you cool down a cup of coffee. OK, how 00:14:11.940 --> 00:14:14.899 so? You blow on it to let the hottest steam escape. 00:14:15.049 --> 00:14:18.049 Right? Leaving the cooler liquid behind. Yeah. 00:14:18.309 --> 00:14:20.789 In a pinning trap, they lower the magnetic walls 00:14:20.789 --> 00:14:23.529 just enough to let the fastest, most energetic 00:14:23.529 --> 00:14:26.549 antiprotons escape and annihilate. Oh, wow. Leaving 00:14:26.549 --> 00:14:29.129 the slower, cooler ones behind. But this raises 00:14:29.129 --> 00:14:31.309 an important question, because the math on that 00:14:31.309 --> 00:14:34.049 evaporative cooling is brutal. The sources show 00:14:34.049 --> 00:14:36.169 that during this trapping and cooling process, 00:14:36.730 --> 00:14:40.629 over 99 .9 % of the antiprotons produced are 00:14:40.629 --> 00:14:43.750 lost. It's tremendously inefficient. You might 00:14:43.750 --> 00:14:45.950 make millions of them in a collision and only 00:14:45.950 --> 00:14:48.409 end up with a few dozen cold enough to use. Which 00:14:48.409 --> 00:14:50.830 is why the milestones they have achieved are 00:14:50.830 --> 00:14:54.470 so staggering, like the LFEA experiment at CERN. 00:14:54.950 --> 00:14:57.669 They didn't just slow down antiprotons, they 00:14:57.669 --> 00:15:01.129 gently merged them with cold positrons to form 00:15:01.129 --> 00:15:03.840 neutral antihydrogen atoms. And because a neutral 00:15:03.840 --> 00:15:05.779 atom doesn't have an electric charge, they couldn't 00:15:05.779 --> 00:15:07.960 use a normal penning prop anymore, right? Exactly. 00:15:08.200 --> 00:15:10.820 They had to invent an entirely new type of magnetic 00:15:10.820 --> 00:15:13.639 bottle that exploits the tiny magnetic moments 00:15:13.639 --> 00:15:15.980 of the atoms themselves. And they managed to 00:15:15.980 --> 00:15:18.419 hold anti -hydrogen stable for a thousand seconds. 00:15:18.700 --> 00:15:22.200 Over 16 minutes. That's amazing! For a substance 00:15:22.200 --> 00:15:25.019 that, in a thunderstorm, exists for literally 00:15:25.019 --> 00:15:27.740 microseconds before destroying itself, holding 00:15:27.740 --> 00:15:30.559 it perfectly still for 16 minutes is a monumental 00:15:30.559 --> 00:15:32.720 feat. It gave them the time they needed to shine 00:15:32.720 --> 00:15:35.360 lasers on the anti -hydrogen and study its atomic 00:15:35.360 --> 00:15:37.940 spectra, confirming that it absorbs and emits 00:15:37.940 --> 00:15:40.600 light identically to normal hydrogen. Which is 00:15:40.600 --> 00:15:43.679 huge. But it also perfectly explains why anti 00:15:43.679 --> 00:15:46.000 -matter is routinely cited as the most expensive 00:15:46.000 --> 00:15:48.950 substance on Earth. NASA once estimated that 00:15:48.950 --> 00:15:51.610 producing a single gram of anti -hydrogen would 00:15:51.610 --> 00:15:55.850 cost $62 .5 trillion. It's an astronomical number, 00:15:56.190 --> 00:15:57.909 yeah. But you have to understand that particle 00:15:57.909 --> 00:16:00.870 accelerators were designed to be physics research 00:16:00.870 --> 00:16:03.649 tools. Not industrial anti -matter factories. 00:16:03.950 --> 00:16:06.169 Right. The sheer amount of electricity required 00:16:06.169 --> 00:16:08.610 to run the superconducting magnets and accelerate 00:16:08.610 --> 00:16:11.870 the beams makes the overhead cost per particle 00:16:11.870 --> 00:16:15.450 astronomical. So what does this all mean? If 00:16:15.450 --> 00:16:17.870 it costs trillions of dollars for a gram and 00:16:17.870 --> 00:16:20.830 it's incredibly dangerous to store, what is the 00:16:20.830 --> 00:16:23.210 practical application? Why should anyone listening 00:16:23.210 --> 00:16:25.889 to this care about antimatter beyond the sci 00:16:25.889 --> 00:16:28.370 -fi factor? Because it is already saving lives. 00:16:28.929 --> 00:16:31.129 Antimatter is currently used every single day 00:16:31.129 --> 00:16:33.490 in modern hospitals. Really? Every day? Yes. 00:16:33.789 --> 00:16:35.950 If you or someone in your family has ever had 00:16:35.950 --> 00:16:38.830 a peat scan to detect cancer or monitor brain 00:16:38.830 --> 00:16:41.870 function, you have directly benefited from antimatter. 00:16:41.980 --> 00:16:44.559 Wait, PT stands for positron emission tomography, 00:16:44.700 --> 00:16:47.179 positron, the antimatter electron. Exactly. How 00:16:47.179 --> 00:16:50.500 does that actually map the human body? Are doctors 00:16:50.500 --> 00:16:53.720 injecting people with antimatter? Not exactly. 00:16:54.320 --> 00:16:56.399 Doctors inject the patient with a very safe, 00:16:56.740 --> 00:16:59.840 short -lived radioactive tracer, often a modified 00:16:59.840 --> 00:17:02.419 form of glucose, like a sugar. OK. And because 00:17:02.419 --> 00:17:05.160 tumors consume a lot of energy, they absorb a 00:17:05.160 --> 00:17:07.980 lot of the sugar. Right. As the radioactive isotope 00:17:07.980 --> 00:17:10.839 in the sugar decays inside the tumor, it spits 00:17:10.839 --> 00:17:13.730 out a positron. Which immediately hits a normal 00:17:13.730 --> 00:17:15.630 electron in the patient's surrounding tissue. 00:17:15.710 --> 00:17:17.970 And they annihilate instantly. And here's the 00:17:17.970 --> 00:17:20.569 brilliant part of the physics. To conserve momentum, 00:17:21.210 --> 00:17:24.089 that annihilation creates two gamma rays that 00:17:24.089 --> 00:17:26.670 shoot out of the body in exactly opposite directions. 00:17:26.930 --> 00:17:29.490 180 degrees apart. Yes. The patient is lying 00:17:29.490 --> 00:17:32.690 inside a ring of detectors. When the ring detects 00:17:32.690 --> 00:17:35.109 two gamma ray hits on opposite sides at the exact 00:17:35.109 --> 00:17:37.390 same time, the computer draws a straight line 00:17:37.390 --> 00:17:39.529 between those two points. Because the annihilation 00:17:39.529 --> 00:17:41.670 had to happen somewhere exactly on that line. 00:17:41.970 --> 00:17:44.829 Exactly. As millions of these annihilations happen, 00:17:45.170 --> 00:17:47.190 the computer draws millions of intersecting lines. 00:17:47.230 --> 00:17:49.930 Where all the lines cross creates a highly detailed 00:17:49.930 --> 00:17:52.509 three -dimensional map of exactly where the tumor 00:17:52.509 --> 00:17:55.289 is metabolizing the sugar. It relies entirely 00:17:55.289 --> 00:17:58.369 on the predictable physics of anti -matter annihilation. 00:17:58.430 --> 00:18:01.569 That is profound. We are using the most destructive 00:18:01.569 --> 00:18:04.450 reaction in the universe to pinpoint disease 00:18:04.450 --> 00:18:06.609 at a molecular level. Brilliant engineering. 00:18:06.970 --> 00:18:09.329 And I saw researchers are even testing anti -proton 00:18:09.329 --> 00:18:12.150 radiation therapy, where they would fire anti... 00:18:12.039 --> 00:18:15.299 protons directly into a tumor to annihilate right 00:18:15.299 --> 00:18:17.720 on top of the cancer cells. Destroying them from 00:18:17.720 --> 00:18:21.220 the inside out with microscopic explosions while 00:18:21.220 --> 00:18:23.460 sparing the healthy tissue. It is a remarkable 00:18:23.460 --> 00:18:26.900 leap from abstract mathematics to oncology. Definitely. 00:18:27.359 --> 00:18:29.839 But of course, we cannot ignore the other application 00:18:29.839 --> 00:18:32.680 that always dominates the conversation, fuel. 00:18:32.819 --> 00:18:36.079 The ultimate energy density. The sci -fi holy 00:18:36.079 --> 00:18:38.319 grail for interstellar travel. Because if you 00:18:38.319 --> 00:18:40.500 want to push a heavy spacecraft to another star, 00:18:40.940 --> 00:18:42.819 you need an energy source that doesn't require 00:18:42.819 --> 00:18:45.140 you to carry millions of tons of heavy rocket 00:18:45.140 --> 00:18:48.180 fuel. And the math of antimatter is unmatched 00:18:48.180 --> 00:18:51.339 by anything else in physics. If you reacted just 00:18:51.339 --> 00:18:54.539 one single kilogram of antimatter with one kilogram 00:18:54.539 --> 00:18:58.730 of normal matter, The 100 % conversion to energy 00:18:58.730 --> 00:19:01.750 yields an explosion equivalent to 43 megatons 00:19:01.750 --> 00:19:05.109 of TNT. 43 megatons. To put that in perspective, 00:19:05.269 --> 00:19:07.769 the Tsar Bomba, the largest and most terrifying 00:19:07.769 --> 00:19:10.569 nuclear weapon ever detonated by humanity, was 00:19:10.569 --> 00:19:12.950 roughly 50 megatons. And that was a physical 00:19:12.950 --> 00:19:16.170 bomb that weighed 27 ,000 kilograms. So you're 00:19:16.170 --> 00:19:18.650 saying we could achieve roughly the same energy 00:19:18.650 --> 00:19:21.329 output from a matter -antimatter reaction the 00:19:21.329 --> 00:19:23.549 size of two bags of sugar. The energy density 00:19:23.549 --> 00:19:26.880 is flawless. But there is a massive engineering 00:19:26.880 --> 00:19:29.819 reality check that science fiction often ignores. 00:19:30.079 --> 00:19:32.140 Uh -oh, what's the catch? You can't just ignite 00:19:32.140 --> 00:19:34.559 an explosion that big inside a rocket and expect 00:19:34.559 --> 00:19:36.819 it to push the ship forward. You have to direct 00:19:36.819 --> 00:19:39.240 the energy out the back of a nozzle to create 00:19:39.240 --> 00:19:41.420 thrust. Right, like a bell on the bottom of a 00:19:41.420 --> 00:19:43.920 conventional chemical rocket. But you can't use 00:19:43.920 --> 00:19:45.700 a physical metal nozzle because the explosion 00:19:45.700 --> 00:19:47.720 would just vaporize it. Exactly. So you'd have 00:19:47.720 --> 00:19:49.740 to use a magnetic nozzle, right? Just like the 00:19:49.740 --> 00:19:51.839 penning traps. That is the logical assumption. 00:19:52.240 --> 00:19:54.880 But it fails because of what the explosion is 00:19:54.880 --> 00:19:57.460 actually made of. When you smash protons and 00:19:57.460 --> 00:19:59.980 antiprotons together, they don't just instantly 00:19:59.980 --> 00:20:03.140 become pure light. They don't. No. The annihilation 00:20:03.140 --> 00:20:05.380 creates a spray of intermediate particles called 00:20:05.380 --> 00:20:09.019 pions. Within nanoseconds, these pions decay 00:20:09.019 --> 00:20:11.839 into muons, gamma ray photons, and neutrinos. 00:20:12.000 --> 00:20:14.680 Oh, wait. I see the problem. Magnetic fields 00:20:14.680 --> 00:20:17.460 can only grab onto and steer particles that carry 00:20:17.460 --> 00:20:20.160 an electric charge. Got it. Gamma rays are light. 00:20:20.160 --> 00:20:23.029 They have no electric charge. Neutrinos are famously 00:20:23.029 --> 00:20:26.049 neutral, uncharged particles that rarely interact 00:20:26.049 --> 00:20:28.390 with anything. So because they lack a charge, 00:20:28.730 --> 00:20:31.509 a magnetic nozzle cannot steer them. The vast 00:20:31.509 --> 00:20:34.190 majority of the energy from your antimatter explosion 00:20:34.190 --> 00:20:36.470 takes a form of gamma rays and neutrinos that 00:20:36.470 --> 00:20:38.470 just phase right through your magnetic fields 00:20:38.470 --> 00:20:41.440 and fly off in every direction. irradiating your 00:20:41.440 --> 00:20:44.240 ship and providing zero directed thrust. Precisely. 00:20:44.420 --> 00:20:46.059 You essentially have the most powerful engine 00:20:46.059 --> 00:20:48.859 in the universe, but the exhaust completely ignores 00:20:48.859 --> 00:20:50.680 the engine and just phases through the walls. 00:20:50.900 --> 00:20:53.339 Wow, so no fueling up our cars with antimatter 00:20:53.339 --> 00:20:56.259 anytime soon. No. Hyperdrive rockets are going 00:20:56.259 --> 00:20:58.539 to stay in the realm of fiction for the foreseeable 00:20:58.539 --> 00:21:00.750 future. That's a bummer, but I guess the true 00:21:00.750 --> 00:21:03.750 value of antimatter research right now lies in 00:21:03.750 --> 00:21:05.769 pushing the boundaries of precision measurement, 00:21:06.309 --> 00:21:08.990 testing quantum mechanics, and giving us tools 00:21:08.990 --> 00:21:12.190 to peer inside the human body. Exactly. That's 00:21:12.190 --> 00:21:14.759 the real -world value. It is wild to think about 00:21:14.759 --> 00:21:17.160 the journey we've traced today. We started with 00:21:17.160 --> 00:21:20.160 Paul Dirac staring at a chalkboard in the 1920s 00:21:20.160 --> 00:21:22.660 trying to make quantum mechanics and relativity 00:21:22.660 --> 00:21:25.480 play nice. And moving to massive underground 00:21:25.480 --> 00:21:27.980 particle accelerators in Switzerland holding 00:21:27.980 --> 00:21:30.960 invisible fire in magnetic cages. All the way 00:21:30.960 --> 00:21:33.400 to life -saving medical scanners in hospitals 00:21:33.400 --> 00:21:36.390 around the world today. It is a substance that 00:21:36.390 --> 00:21:38.509 literally annihilates everything it touches, 00:21:38.809 --> 00:21:41.170 yet it is fundamentally necessary to understanding 00:21:41.170 --> 00:21:43.490 how our universe operates. And if you want a 00:21:43.490 --> 00:21:46.150 final thought to mull over, remember what we 00:21:46.150 --> 00:21:49.490 established about the LPHA experiment. Antihydrogen 00:21:49.490 --> 00:21:52.369 emits the exact same atomic spectrum of light 00:21:52.369 --> 00:21:54.970 as normal hydrogen. Right, the electromagnetic 00:21:54.970 --> 00:21:57.609 radiation is perfectly identical. Which means 00:21:57.609 --> 00:22:00.690 there is a distinct lingering possibility that 00:22:00.690 --> 00:22:03.450 somewhere deep in the cosmos, untouched by our 00:22:03.450 --> 00:22:06.470 observational limits, entire pristine galaxies 00:22:06.470 --> 00:22:09.390 made entirely of antimatter are silently orbiting. 00:22:09.579 --> 00:22:13.380 Wait, really? Yeah. Antimatter suns warming antimatter 00:22:13.380 --> 00:22:16.579 planets. Through our telescopes on Earth, analyzing 00:22:16.579 --> 00:22:18.819 the light they emit, we would never know they 00:22:18.819 --> 00:22:20.740 were any different from our own Milky Way. Because 00:22:20.740 --> 00:22:22.799 the light is the exact same. You would never 00:22:22.799 --> 00:22:26.240 realize it was a mirrored universe until a single 00:22:26.240 --> 00:22:29.339 drifting piece of our normal matter crossed the 00:22:29.339 --> 00:22:32.319 cosmic void and touched their atmosphere. A silent, 00:22:32.619 --> 00:22:35.000 identical mirror universe, perfectly camouflaged 00:22:35.000 --> 00:22:37.000 by its own light just waiting in the dark. That 00:22:37.000 --> 00:22:39.710 is incredible. So next time... were caught outside 00:22:39.710 --> 00:22:41.549 in a thunderstorm and you look up at those dark 00:22:41.549 --> 00:22:43.970 clouds. Remember the physical world is strange, 00:22:44.230 --> 00:22:46.490 it is perfectly mirrored, and the most exotic 00:22:46.490 --> 00:22:48.470 physics in the cosmos is happening right above 00:22:48.470 --> 00:22:48.890 your head.