1 00:00:00,000 --> 00:00:01,660 Okay, so picture this. 2 00:00:01,660 --> 00:00:03,360 You're at a crossroads, right? 3 00:00:03,360 --> 00:00:05,160 Like a big decision, a job offer, 4 00:00:05,160 --> 00:00:07,760 or maybe like something huge, life altering. 5 00:00:07,760 --> 00:00:08,840 Yeah, yep. 6 00:00:08,840 --> 00:00:11,320 In one reality, you jump in head first, 7 00:00:11,320 --> 00:00:13,520 but in another, you decide to play it safe. 8 00:00:14,520 --> 00:00:16,600 Now, zoom out for a second. 9 00:00:16,600 --> 00:00:19,680 Imagine every single choice, 10 00:00:19,680 --> 00:00:22,920 every quantum event, even a random coin toss. 11 00:00:22,920 --> 00:00:24,200 It all splits the universe 12 00:00:24,200 --> 00:00:26,640 and makes a new reality for every outcome. 13 00:00:26,640 --> 00:00:27,680 Wow. 14 00:00:27,680 --> 00:00:29,480 That's basically the mind blowing idea 15 00:00:29,480 --> 00:00:30,560 behind the multiverse. 16 00:00:30,560 --> 00:00:31,720 Infinite possibilities. 17 00:00:31,720 --> 00:00:33,160 Infinite versions of ourselves, 18 00:00:33,160 --> 00:00:35,840 making every imaginable choice. 19 00:00:35,840 --> 00:00:38,640 Welcome to Cosmos in a Pod, the space and astronomy series. 20 00:00:38,640 --> 00:00:41,000 Please like, comment, share, and subscribe. 21 00:00:41,000 --> 00:00:43,760 Today, we're diving deep into the multiverse. 22 00:00:43,760 --> 00:00:44,640 What is it? 23 00:00:44,640 --> 00:00:47,080 Why do some physicists think it exists? 24 00:00:47,080 --> 00:00:49,480 What could it mean for our understanding of, well, 25 00:00:49,480 --> 00:00:50,320 everything? 26 00:00:50,320 --> 00:00:52,320 You know, what's fascinating to me about the multiverse 27 00:00:52,320 --> 00:00:54,760 is it's not just science fiction, you know what I mean? 28 00:00:54,760 --> 00:00:56,620 It comes out of some of the most solid theories 29 00:00:56,620 --> 00:00:59,200 we have in physics, like quantum mechanics and cosmology. 30 00:00:59,200 --> 00:01:00,800 And there are different models 31 00:01:00,800 --> 00:01:02,760 of what this multiverse might actually look like. 32 00:01:02,760 --> 00:01:05,800 So it's not just like one giant multiverse out there. 33 00:01:05,800 --> 00:01:06,640 Right. 34 00:01:06,640 --> 00:01:07,480 There are levels, different types. 35 00:01:07,480 --> 00:01:08,720 My head's already spinning. 36 00:01:08,720 --> 00:01:09,840 Absolutely. 37 00:01:09,840 --> 00:01:10,680 You got it. 38 00:01:10,680 --> 00:01:11,760 Physicist Max Tegmark, 39 00:01:11,760 --> 00:01:14,440 he came up with a way to classify these multiverses. 40 00:01:14,440 --> 00:01:16,520 He breaks them down into four levels. 41 00:01:16,520 --> 00:01:18,400 Each level builds on the last one. 42 00:01:18,400 --> 00:01:20,080 And they get more and more complex, 43 00:01:20,080 --> 00:01:21,920 more weird, you could say. 44 00:01:21,920 --> 00:01:23,480 Okay, I'm all about weirdness. 45 00:01:23,480 --> 00:01:24,320 Yeah. 46 00:01:24,320 --> 00:01:25,360 Especially when it comes to the universe. 47 00:01:25,360 --> 00:01:28,960 So level one, the most basic, what's that look like? 48 00:01:28,960 --> 00:01:31,960 Okay, so level one is called the quilted multiverse. 49 00:01:31,960 --> 00:01:35,360 It all starts with the idea of an infinite universe. 50 00:01:35,360 --> 00:01:36,560 Imagine a quilt, right? 51 00:01:36,560 --> 00:01:37,400 Yeah. 52 00:01:37,400 --> 00:01:38,640 With just endless patches. 53 00:01:38,640 --> 00:01:41,480 Each patch is like our observable universe, 54 00:01:41,480 --> 00:01:44,400 a bubble of space with galaxies, stars, planets, 55 00:01:44,400 --> 00:01:45,360 the whole thing. 56 00:01:45,360 --> 00:01:47,680 Now, if the universe really is infinite, 57 00:01:47,680 --> 00:01:50,880 then statistically, every possible arrangement 58 00:01:50,880 --> 00:01:53,080 of matter and energy has to repeat. 59 00:01:53,080 --> 00:01:53,920 Whoa, hold on. 60 00:01:53,920 --> 00:01:55,320 So you're saying there's a patch out there, 61 00:01:55,320 --> 00:01:57,720 an identical copy of our observable universe. 62 00:01:57,720 --> 00:01:58,560 Yeah. 63 00:01:58,560 --> 00:02:00,800 With another me recording this podcast. 64 00:02:00,800 --> 00:02:01,640 Exactly. 65 00:02:01,640 --> 00:02:03,440 That's incredible and also kind of creepy. 66 00:02:03,440 --> 00:02:05,400 Right, and not just one copy. 67 00:02:05,400 --> 00:02:06,280 Think about it. 68 00:02:06,280 --> 00:02:08,760 If space is infinite, there are infinite copies 69 00:02:08,760 --> 00:02:12,120 of you, me, this planet, even this conversation happening 70 00:02:12,120 --> 00:02:13,040 over and over again. 71 00:02:13,040 --> 00:02:15,920 It's like this ultimate cosmic echo. 72 00:02:15,920 --> 00:02:17,600 But you said these are just regions 73 00:02:17,600 --> 00:02:19,160 like our observable universe. 74 00:02:19,160 --> 00:02:22,080 Does that mean in a level one multiverse, 75 00:02:22,080 --> 00:02:24,360 everything's basically following the same rules 76 00:02:24,360 --> 00:02:25,680 of physics as ours? 77 00:02:25,680 --> 00:02:26,800 Precisely. 78 00:02:26,800 --> 00:02:30,040 The basic laws of physics, the fundamental forces, 79 00:02:30,040 --> 00:02:32,960 all the building blocks, those stay the same 80 00:02:32,960 --> 00:02:34,400 in a level one multiverse. 81 00:02:34,400 --> 00:02:36,400 It's just the arrangement of everything that changes, 82 00:02:36,400 --> 00:02:39,280 creating these different cosmic landscapes. 83 00:02:39,280 --> 00:02:39,760 Got it. 84 00:02:39,760 --> 00:02:41,600 So level one, infinite repetitions 85 00:02:41,600 --> 00:02:42,760 of regions like ours. 86 00:02:42,760 --> 00:02:43,440 What about level two? 87 00:02:43,440 --> 00:02:44,640 Does it get weirder from here? 88 00:02:44,640 --> 00:02:46,680 Oh, level two is where things get really interesting. 89 00:02:46,680 --> 00:02:48,880 This is called the inflationary multiverse. 90 00:02:48,880 --> 00:02:50,880 It comes from the idea of cosmic inflation. 91 00:02:50,880 --> 00:02:53,080 I remember learning about cosmic inflation. 92 00:02:53,080 --> 00:02:54,800 It's that idea that the universe expanded 93 00:02:54,800 --> 00:02:57,360 way faster than the speed of light for a tiny fraction 94 00:02:57,360 --> 00:02:59,080 of a second right after the Big Bang. 95 00:02:59,080 --> 00:02:59,640 Exactly. 96 00:02:59,640 --> 00:03:01,240 But how does that lead to a multiverse? 97 00:03:01,240 --> 00:03:02,960 Well, the inflationary multiverse 98 00:03:02,960 --> 00:03:06,640 proposes that this crazy expansion didn't stop everywhere 99 00:03:06,640 --> 00:03:08,120 at the same time. 100 00:03:08,120 --> 00:03:11,240 Some areas kept inflating, even as others, like Ari, 101 00:03:11,240 --> 00:03:12,720 settled down and cooled. 102 00:03:12,720 --> 00:03:13,240 OK. 103 00:03:13,240 --> 00:03:18,360 Picture it like bubbles forming in a giant expanding foam, 104 00:03:18,360 --> 00:03:19,040 right? 105 00:03:19,040 --> 00:03:22,160 Each bubble becomes its own universe. 106 00:03:22,160 --> 00:03:24,200 So each bubble is like a separate universe, 107 00:03:24,200 --> 00:03:25,520 disconnected from the others. 108 00:03:25,520 --> 00:03:26,960 What's happening inside those bubbles? 109 00:03:26,960 --> 00:03:28,760 That's where things get really mind-bending. 110 00:03:28,760 --> 00:03:30,720 In the inflationary multiverse, not only 111 00:03:30,720 --> 00:03:32,760 could matter be arranged differently, 112 00:03:32,760 --> 00:03:35,080 but the fundamental laws of physics, 113 00:03:35,080 --> 00:03:37,000 they could be different in each bubble. 114 00:03:37,000 --> 00:03:38,400 Wait, hold on. 115 00:03:38,400 --> 00:03:40,280 You're saying that in some of these bubbles, 116 00:03:40,280 --> 00:03:42,200 gravity could work differently, or light 117 00:03:42,200 --> 00:03:43,600 could travel at a different speed. 118 00:03:43,600 --> 00:03:45,000 It might sound crazy, but that's 119 00:03:45,000 --> 00:03:46,720 what this model implies. 120 00:03:46,720 --> 00:03:49,960 Imagine a universe where gravity is way weaker, 121 00:03:49,960 --> 00:03:52,800 where stars are enormous and spread out, 122 00:03:52,800 --> 00:03:56,000 or a universe where electromagnetism is stronger, 123 00:03:56,000 --> 00:03:58,840 so atoms bond in completely new ways, 124 00:03:58,840 --> 00:04:00,920 creating matter we can't even imagine. 125 00:04:00,920 --> 00:04:02,400 So it's like each bubble universe 126 00:04:02,400 --> 00:04:03,920 is playing by a different set of rules, 127 00:04:03,920 --> 00:04:05,400 like completely separate realities. 128 00:04:05,400 --> 00:04:07,800 If the first level is about infinite copies, 129 00:04:07,800 --> 00:04:10,160 the second level is about infinite variety, then. 130 00:04:10,160 --> 00:04:11,200 You got it. 131 00:04:11,200 --> 00:04:14,040 The inflationary multiverse is all about diversity, 132 00:04:14,040 --> 00:04:16,680 not just what exists, but the laws that govern it all. 133 00:04:16,680 --> 00:04:18,400 Wow, that's a lot to take in. 134 00:04:18,400 --> 00:04:19,040 Yeah. 135 00:04:19,040 --> 00:04:21,920 All right, two levels down, two to go. 136 00:04:21,920 --> 00:04:24,200 I'm almost afraid to ask, but what's level three 137 00:04:24,200 --> 00:04:25,360 got in store for us? 138 00:04:25,360 --> 00:04:26,960 Level three, this is where we dive 139 00:04:26,960 --> 00:04:28,960 deep into the quantum realm. 140 00:04:28,960 --> 00:04:31,720 It's called the many-worlds interpretation, 141 00:04:31,720 --> 00:04:34,100 and it's all about choices, possibilities, 142 00:04:34,100 --> 00:04:36,440 and the crazy nature of quantum mechanics. 143 00:04:36,440 --> 00:04:38,160 OK, I remember enough from physics class 144 00:04:38,160 --> 00:04:39,800 to know that quantum mechanics is where 145 00:04:39,800 --> 00:04:42,680 things get really weird, particles in multiple states 146 00:04:42,680 --> 00:04:45,400 at once, cats both alive and dead. 147 00:04:45,400 --> 00:04:46,560 It's mind-bending stuff. 148 00:04:46,560 --> 00:04:47,080 Right. 149 00:04:47,080 --> 00:04:48,660 Now imagine taking that weirdness 150 00:04:48,660 --> 00:04:50,880 and applying it to the whole universe. 151 00:04:50,880 --> 00:04:52,400 The many-worlds interpretation says 152 00:04:52,400 --> 00:04:54,560 that every time a quantum measurement happens, 153 00:04:54,560 --> 00:04:57,040 every time a particle picks one state over another, 154 00:04:57,040 --> 00:04:58,640 reality splits. 155 00:04:58,640 --> 00:05:00,600 OK, so instead of one reality, there 156 00:05:00,600 --> 00:05:03,400 are countless parallel universes branching off 157 00:05:03,400 --> 00:05:04,280 every single moment. 158 00:05:04,280 --> 00:05:05,640 Precisely. 159 00:05:05,640 --> 00:05:08,520 Imagine a tree with infinite branches. 160 00:05:08,520 --> 00:05:12,000 Every decision, every tiny interaction at the quantum 161 00:05:12,000 --> 00:05:15,040 level, it creates a new branch, a new universe 162 00:05:15,040 --> 00:05:16,600 where that outcome plays out. 163 00:05:16,600 --> 00:05:17,100 Hold on. 164 00:05:17,100 --> 00:05:19,620 Are you saying that in some parallel universe, 165 00:05:19,620 --> 00:05:22,840 I decided to wear a different shirt today, 166 00:05:22,840 --> 00:05:25,520 or I ordered a different coffee this morning, 167 00:05:25,520 --> 00:05:27,520 and there's a whole universe where that happened? 168 00:05:27,520 --> 00:05:30,600 That's the essence of the many-worlds interpretation. 169 00:05:30,600 --> 00:05:33,440 In this level of the multiverse, every possible outcome 170 00:05:33,440 --> 00:05:35,440 of every quantum event actually exists 171 00:05:35,440 --> 00:05:37,680 in its own separate reality. 172 00:05:37,680 --> 00:05:39,240 That's a lot to process. 173 00:05:39,240 --> 00:05:39,720 Yeah. 174 00:05:39,720 --> 00:05:42,880 It's dizzying, but it comes from some pretty basic principles 175 00:05:42,880 --> 00:05:44,040 of quantum mechanics, right? 176 00:05:44,040 --> 00:05:44,540 Yeah. 177 00:05:44,540 --> 00:05:46,760 OK, three levels of the multiverse down, 178 00:05:46,760 --> 00:05:49,040 and my head is officially spinning. 179 00:05:49,040 --> 00:05:52,280 Each one is more mind-blowing than the last. 180 00:05:52,280 --> 00:05:54,440 Before we get to level four, which I can only imagine 181 00:05:54,440 --> 00:05:56,200 is the most extreme of them all, I 182 00:05:56,200 --> 00:05:57,880 think we need to take a quick break. 183 00:05:57,880 --> 00:06:00,960 When we come back, we'll tackle the final level of Tegmark's 184 00:06:00,960 --> 00:06:02,960 multiverse and discuss whether there's 185 00:06:02,960 --> 00:06:05,360 any way to know if these mind-bending ideas are 186 00:06:05,360 --> 00:06:06,600 actually true. 187 00:06:06,600 --> 00:06:08,660 Stay with us. 188 00:06:08,660 --> 00:06:10,560 Welcome back to Cosmos in a Pod. 189 00:06:10,560 --> 00:06:13,440 We're on this wild ride through the multiverse, right? 190 00:06:13,440 --> 00:06:16,000 We've explored three levels so far, infinite copies, 191 00:06:16,000 --> 00:06:18,280 bubble universes with their own physics, 192 00:06:18,280 --> 00:06:19,960 even realities built on pure math. 193 00:06:19,960 --> 00:06:20,960 It's a lot, yeah. 194 00:06:20,960 --> 00:06:22,240 And there's still one level to go, 195 00:06:22,240 --> 00:06:24,680 and I have a feeling it's going to be the wildest one yet. 196 00:06:24,680 --> 00:06:26,680 Oh, you're ready for level four. 197 00:06:26,680 --> 00:06:29,240 Buckle up, because this is where we go full on 198 00:06:29,240 --> 00:06:31,200 into the realm of pure possibility, 199 00:06:31,200 --> 00:06:33,480 the ultimate mathematical multiverse. 200 00:06:33,480 --> 00:06:34,320 OK, hit me with it. 201 00:06:34,320 --> 00:06:36,240 What makes this level so ultimate? 202 00:06:36,240 --> 00:06:38,520 Level four says that every universe that's 203 00:06:38,520 --> 00:06:40,760 mathematically possible actually exists. 204 00:06:40,760 --> 00:06:41,720 Think of it this way. 205 00:06:41,720 --> 00:06:45,520 If you can describe a universe with equations, with math, 206 00:06:45,520 --> 00:06:48,720 then it's out there somewhere in this massive multiverse. 207 00:06:48,720 --> 00:06:49,800 Wait, hold on. 208 00:06:49,800 --> 00:06:53,080 Any mathematical equation, any kind of logic, 209 00:06:53,080 --> 00:06:56,080 no matter how strange, could be a real universe. 210 00:06:56,080 --> 00:06:57,200 Exactly. 211 00:06:57,200 --> 00:07:00,440 In this model, our universe with its specific laws of physics 212 00:07:00,440 --> 00:07:03,600 is just one tiny point in an infinite landscape 213 00:07:03,600 --> 00:07:05,680 of mathematical possibilities. 214 00:07:05,680 --> 00:07:08,760 There could be universes where gravity pushes things apart 215 00:07:08,760 --> 00:07:10,320 instead of pulling them together, 216 00:07:10,320 --> 00:07:13,200 where time runs backward, or even 217 00:07:13,200 --> 00:07:16,520 universes where reality itself is made of something totally 218 00:07:16,520 --> 00:07:18,280 different from the particles we know. 219 00:07:18,280 --> 00:07:20,960 So in a level four multiverse, we're 220 00:07:20,960 --> 00:07:23,400 not just talking about different arrangements of stuff 221 00:07:23,400 --> 00:07:24,960 or even different laws. 222 00:07:24,960 --> 00:07:26,960 We're talking about completely different realities. 223 00:07:26,960 --> 00:07:29,480 Operating on principles we can barely wrap our heads around. 224 00:07:29,480 --> 00:07:31,160 It's like this cosmic library, right? 225 00:07:31,160 --> 00:07:32,920 Each book is a different universe 226 00:07:32,920 --> 00:07:35,280 with its own rules, its own possibilities. 227 00:07:35,280 --> 00:07:37,640 And some of these books would be total gibberish to us, 228 00:07:37,640 --> 00:07:39,680 stuff we couldn't even begin to understand. 229 00:07:39,680 --> 00:07:42,040 Exactly, beyond our comprehension. 230 00:07:42,040 --> 00:07:44,480 But in this level, they all exist. 231 00:07:44,480 --> 00:07:46,800 So does that mean every crazy theory 232 00:07:46,800 --> 00:07:48,360 physicists have ever come up with 233 00:07:48,360 --> 00:07:50,160 has a universe where it's true? 234 00:07:50,160 --> 00:07:51,320 That's a wild thought. 235 00:07:51,320 --> 00:07:53,520 That's the implication, yeah. 236 00:07:53,520 --> 00:07:56,800 A universe where string theory is the real deal 237 00:07:56,800 --> 00:08:00,000 or where the speed of light is just a suggestion. 238 00:08:00,000 --> 00:08:03,040 The possibilities are truly endless. 239 00:08:03,040 --> 00:08:05,360 OK, we've got these four levels, each one more 240 00:08:05,360 --> 00:08:07,040 mind-blowing than the last. 241 00:08:07,040 --> 00:08:08,760 But let's be real here. 242 00:08:08,760 --> 00:08:12,600 Is there any way to know if any of this is actually true? 243 00:08:12,600 --> 00:08:15,760 It's a cool concept, but do we have any evidence? 244 00:08:15,760 --> 00:08:17,360 Yeah, that's a big question. 245 00:08:17,360 --> 00:08:18,520 It's the ultimate question. 246 00:08:18,520 --> 00:08:21,440 And honestly, directly observing another universe 247 00:08:21,440 --> 00:08:23,600 is beyond what we can do right now. 248 00:08:23,600 --> 00:08:25,640 But that doesn't mean we're totally clueless. 249 00:08:25,640 --> 00:08:27,840 There are a few really intriguing hints 250 00:08:27,840 --> 00:08:29,440 that scientists are looking into. 251 00:08:29,440 --> 00:08:30,640 OK, give me some hope here. 252 00:08:30,640 --> 00:08:31,720 What kind of hints? 253 00:08:31,720 --> 00:08:34,480 One way is to study the cosmic microwave's background 254 00:08:34,480 --> 00:08:35,160 radiation. 255 00:08:35,160 --> 00:08:37,200 It's like the afterglow of the Big Bang, right? 256 00:08:37,200 --> 00:08:40,200 Imagine our universe bumped into another one way back when. 257 00:08:40,200 --> 00:08:42,680 That collision might have left little marks on the CMB, 258 00:08:42,680 --> 00:08:44,640 like ripples or temperature changes. 259 00:08:44,640 --> 00:08:46,880 So we're looking for cosmic bruises from ancient universe 260 00:08:46,880 --> 00:08:47,520 crashes. 261 00:08:47,520 --> 00:08:48,720 Yeah, something like that. 262 00:08:48,720 --> 00:08:50,240 It's a long shot, but it's something. 263 00:08:50,240 --> 00:08:53,080 Another thing scientists are looking at is quantum computers. 264 00:08:53,080 --> 00:08:55,080 These super powerful computers, they 265 00:08:55,080 --> 00:08:58,320 can do calculations by exploring tons of possibilities 266 00:08:58,320 --> 00:09:00,400 at the same time, almost like tapping 267 00:09:00,400 --> 00:09:02,040 into parallel universes. 268 00:09:02,040 --> 00:09:05,240 Like they're getting a glimpse into these branching timelines. 269 00:09:05,240 --> 00:09:08,480 It's a thought and one that's got a lot of physicists excited. 270 00:09:08,480 --> 00:09:11,200 And then there's string theory, which says our universe might 271 00:09:11,200 --> 00:09:13,720 be like one membrane, one brain floating 272 00:09:13,720 --> 00:09:15,280 in a higher dimensional space. 273 00:09:15,280 --> 00:09:18,040 So like other universes, other brains right next to ours, 274 00:09:18,040 --> 00:09:20,440 just vibrating differently in dimensions we can't see. 275 00:09:20,440 --> 00:09:21,160 Exactly. 276 00:09:21,160 --> 00:09:22,520 And those other brains, they could 277 00:09:22,520 --> 00:09:24,960 be bumping into ours, creating subtle effects 278 00:09:24,960 --> 00:09:26,560 that we might be able to pick up on. 279 00:09:26,560 --> 00:09:28,840 OK, so maybe we can't hop in a spaceship 280 00:09:28,840 --> 00:09:31,520 and visit a parallel universe right now. 281 00:09:31,520 --> 00:09:35,480 But at least there are ways to test these ideas scientifically. 282 00:09:35,480 --> 00:09:37,320 But beyond the science, I can't help 283 00:09:37,320 --> 00:09:39,800 but think about what all this means. 284 00:09:39,800 --> 00:09:43,440 If the multiverse is real, what does that say about us, 285 00:09:43,440 --> 00:09:45,280 about our place in everything? 286 00:09:45,280 --> 00:09:48,480 That's where things get really deep, really philosophical. 287 00:09:48,480 --> 00:09:51,000 And that's exactly what we'll dive into right after this. 288 00:09:51,000 --> 00:09:53,120 Welcome back to Cosmos in a Pod. 289 00:09:53,120 --> 00:09:56,120 It's been a wild ride through the multiverse so far, right? 290 00:09:56,120 --> 00:09:58,000 We've talked about these four levels, each one 291 00:09:58,000 --> 00:10:01,520 crazier than the last, infinite copies of ourselves, 292 00:10:01,520 --> 00:10:04,040 bubble universes with their own laws of physics, 293 00:10:04,040 --> 00:10:06,560 even realities based on pure math. 294 00:10:06,560 --> 00:10:08,400 It's mind blowing. 295 00:10:08,400 --> 00:10:11,520 But now I want to talk about the really big questions, the ones 296 00:10:11,520 --> 00:10:13,400 that keep me up at night. 297 00:10:13,400 --> 00:10:17,440 If the multiverse is real, what does it actually mean for us? 298 00:10:17,440 --> 00:10:19,200 What does it mean for humanity? 299 00:10:19,200 --> 00:10:21,680 Yeah, this is where things get really interesting. 300 00:10:21,680 --> 00:10:23,920 It makes us think about some of the deepest questions 301 00:10:23,920 --> 00:10:27,280 there are, like the nature of reality, the meaning of life, 302 00:10:27,280 --> 00:10:30,000 our place in this vast, maybe infinite cosmos. 303 00:10:30,000 --> 00:10:32,000 OK, so let's start with reality. 304 00:10:32,000 --> 00:10:33,840 If there are infinite universes out there, 305 00:10:33,840 --> 00:10:37,240 does that mean our reality is somehow less real, 306 00:10:37,240 --> 00:10:38,040 less important? 307 00:10:38,040 --> 00:10:38,680 That's a tough one. 308 00:10:38,680 --> 00:10:39,720 And a lot of people have struggled 309 00:10:39,720 --> 00:10:42,400 with that question, both philosophers and scientists. 310 00:10:42,400 --> 00:10:44,600 Some say that if there are infinite versions of us 311 00:10:44,600 --> 00:10:47,200 out there living every possible life, 312 00:10:47,200 --> 00:10:49,600 then maybe our own experiences don't matter as much. 313 00:10:49,600 --> 00:10:50,120 I get that. 314 00:10:50,120 --> 00:10:51,960 It's like, if everything that could happen 315 00:10:51,960 --> 00:10:54,480 does happen somewhere, then what's the point? 316 00:10:54,480 --> 00:10:56,320 Does anything we do really matter? 317 00:10:56,320 --> 00:10:58,400 Yeah, that's one way to look at it. 318 00:10:58,400 --> 00:11:00,240 But I think the multiverse can also 319 00:11:00,240 --> 00:11:03,640 make our reality more amazing, more full of wonder. 320 00:11:03,640 --> 00:11:06,040 Instead of making our reality less important, 321 00:11:06,040 --> 00:11:07,600 it expands it. 322 00:11:07,600 --> 00:11:10,760 Imagine a huge cosmic tapestry, right? 323 00:11:10,760 --> 00:11:14,880 Woven with all these threads, and each thread is a universe. 324 00:11:14,880 --> 00:11:16,840 Every thread is unique, beautiful, 325 00:11:16,840 --> 00:11:19,440 and they all come together to make this grand design. 326 00:11:19,440 --> 00:11:22,560 So instead of feeling small, we should feel a sense of awe, 327 00:11:22,560 --> 00:11:24,760 knowing our universe is just one tiny part 328 00:11:24,760 --> 00:11:26,120 of something much bigger. 329 00:11:26,120 --> 00:11:26,640 Exactly. 330 00:11:26,640 --> 00:11:28,880 It's like, when we realized that the Earth isn't 331 00:11:28,880 --> 00:11:30,880 the center of the universe, our planet 332 00:11:30,880 --> 00:11:32,600 didn't become less special. 333 00:11:32,600 --> 00:11:34,360 We just got a bigger perspective. 334 00:11:34,360 --> 00:11:35,360 I see what you mean. 335 00:11:35,360 --> 00:11:38,760 So it's not about taking away meaning, but adding to it. 336 00:11:38,760 --> 00:11:42,440 But what about the other big question, the meaning of life? 337 00:11:42,440 --> 00:11:44,840 If there are infinite versions of us out there, 338 00:11:44,840 --> 00:11:46,760 all making different choices, does that 339 00:11:46,760 --> 00:11:48,800 mean our lives have no real purpose? 340 00:11:48,800 --> 00:11:51,320 Purpose is a really deep question. 341 00:11:51,320 --> 00:11:54,760 And I don't think the multiverse gives us an easy answer. 342 00:11:54,760 --> 00:11:57,560 Some might argue that if every possibility is playing out 343 00:11:57,560 --> 00:12:00,400 somewhere, then our choices, our actions, 344 00:12:00,400 --> 00:12:02,000 don't have a lasting impact. 345 00:12:02,000 --> 00:12:03,520 So it's like, there's a version of me 346 00:12:03,520 --> 00:12:05,960 out there who's a famous astronaut, and another me 347 00:12:05,960 --> 00:12:07,680 who's a struggling artist. 348 00:12:07,680 --> 00:12:09,640 So my own path doesn't really matter. 349 00:12:09,640 --> 00:12:11,240 I think the multiverse challenges 350 00:12:11,240 --> 00:12:14,440 us to find our own meaning, our own purpose in this life, 351 00:12:14,440 --> 00:12:17,520 in this reality, regardless of what our other selves might 352 00:12:17,520 --> 00:12:18,040 be doing. 353 00:12:18,040 --> 00:12:20,880 It's about focusing on the choices we make right now, 354 00:12:20,880 --> 00:12:23,440 the relationships we build, the impact 355 00:12:23,440 --> 00:12:25,480 we have in our own corner of the universe. 356 00:12:25,480 --> 00:12:27,400 But it's less about finding a universal purpose 357 00:12:27,400 --> 00:12:30,320 and more about creating our own meaning right here, right now. 358 00:12:30,320 --> 00:12:30,840 Exactly. 359 00:12:30,840 --> 00:12:33,000 It's about taking ownership of our lives, 360 00:12:33,000 --> 00:12:35,320 recognizing the freedom and the responsibility 361 00:12:35,320 --> 00:12:37,560 we have to shape our reality. 362 00:12:37,560 --> 00:12:40,600 Wow, this has been an incredible conversation. 363 00:12:40,600 --> 00:12:43,400 Exploring the multiverse has really stretched my imagination 364 00:12:43,400 --> 00:12:46,000 and made me think about reality in a whole new way. 365 00:12:46,000 --> 00:12:48,800 But before we wrap up, I have one last question. 366 00:12:48,800 --> 00:12:52,680 If we could actually prove the multiverse exists, maybe 367 00:12:52,680 --> 00:12:55,640 even travel to these other realities, 368 00:12:55,640 --> 00:12:58,080 how do you think that would change humanity? 369 00:12:58,080 --> 00:13:00,720 That's getting into some serious science fiction territory, 370 00:13:00,720 --> 00:13:03,080 but it's a question worth asking. 371 00:13:03,080 --> 00:13:05,320 Imagine meeting other versions of ourselves, 372 00:13:05,320 --> 00:13:07,560 seeing universes where the laws of physics 373 00:13:07,560 --> 00:13:08,640 are totally different. 374 00:13:08,640 --> 00:13:11,040 It would completely change everything we know. 375 00:13:11,040 --> 00:13:13,240 It would be like the ultimate culture shock, right? 376 00:13:13,240 --> 00:13:15,480 Meeting aliens is one thing, but meeting other versions 377 00:13:15,480 --> 00:13:18,600 of humanity, living in completely different realities, 378 00:13:18,600 --> 00:13:21,480 that would really challenge our understanding of who we are 379 00:13:21,480 --> 00:13:22,840 and what's possible. 380 00:13:22,840 --> 00:13:24,400 It's almost impossible to grasp. 381 00:13:24,400 --> 00:13:27,120 And it brings up some big ethical questions, too. 382 00:13:27,120 --> 00:13:29,080 How would we interact with these other universes? 383 00:13:29,080 --> 00:13:32,320 Would we try to help them, learn from them, 384 00:13:32,320 --> 00:13:34,480 or would we be a danger to them? 385 00:13:34,480 --> 00:13:36,520 Those are questions we might have to face someday. 386 00:13:36,520 --> 00:13:39,920 But for now, they're just food for thought. 387 00:13:39,920 --> 00:13:42,400 This has been an amazing deep dive into the multiverse. 388 00:13:42,400 --> 00:13:44,240 We've explored the science, the philosophy, 389 00:13:44,240 --> 00:13:46,880 the sheer mind-boggling possibilities. 390 00:13:46,880 --> 00:13:49,200 And even though we've just scratched the surface, 391 00:13:49,200 --> 00:13:51,000 I think it's safe to say that the universe, 392 00:13:51,000 --> 00:13:53,360 or I guess I should say the multiverse, 393 00:13:53,360 --> 00:13:55,240 is far stranger and more wonderful 394 00:13:55,240 --> 00:13:56,560 than we could have ever imagined. 395 00:13:56,560 --> 00:13:57,600 Absolutely. 396 00:13:57,600 --> 00:13:59,800 If you enjoyed this exploration of the multiverse, 397 00:13:59,800 --> 00:14:02,160 be sure to follow and subscribe to Cosmos in a Pod 398 00:14:02,160 --> 00:14:03,840 and our YouTube channel. 399 00:14:03,840 --> 00:14:06,000 We'll keep bringing you more amazing journeys 400 00:14:06,000 --> 00:14:06,960 through the cosmos. 401 00:14:06,960 --> 00:14:10,360 Until next time, keep looking up, keep asking questions, 402 00:14:10,360 --> 00:14:12,800 and keep wondering about the infinite possibilities 403 00:14:12,800 --> 00:14:35,640 that might be out there.