Unexplainable - Dark matter and the end of answers

Episode Date: September 21, 2026

Five-sixths of all the matter in the universe is this invisible stuff called dark matter, and scientists barely understand what it is. So what happens if we can't answer arguably the biggest mystery i...n the universe? One physicist decided to quit because he started asking questions that went way beyond what he initially thought science was for. Guest: Joseph Howlett, reporter at Scientific American For show transcripts, go to ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠vox.com/unxtranscripts⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ For more, go to ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠vox.com/unexplainable⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ And please email us! ⁠⁠⁠⁠unexplainable@vox.com⁠⁠⁠⁠ We read every email. Support Unexplainable (and get ad-free episodes) by becoming a Vox Member today: ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠vox.com/members⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ Thank you! Learn more about your ad choices. Visit podcastchoices.com/adchoices

Transcript
Discussion (0)
Starting point is 00:00:00 Are you a pet owner? Every six seconds, a pet owner in the U.S. gets hit with a vet bill over $1,000. Always an unwelcome surprise. That's where Fetch comes in. Fetch is the most complete pet insurance for dogs and cats, according to consumer advocate.org. You get paid back up to 90% of vet bills at any vet in the U.S. in Canada, with claims paid back in as a little as two days.
Starting point is 00:00:27 Go to fetchpet.com slash save right now. for your free quote. That's fetchpet.com slash save. Running a business shouldn't feel like surviving a software group project. One app for accounting, another for inventory, another for sales, and somehow none of them talk to each other. That's where Odo comes in, an all-in-one business management software that brings every part of your business together. From sales and accounting to inventory and marketing, all in one powerful platform. No messy integrations, no bouncing between tabs and best of all, no spreadsheets. Stop managing software and start managing
Starting point is 00:01:05 your business with one unified system. Try for free today at odu.com slash vox. That's odio.com slash vox. Take a look around you. Wherever you are, the table, the TV, your own body. At a basic level, it's the same stuff as everything else. And everything you see if you look out the window, or even further out, the ocean, the rest of the planet, the sun, stars. It's all matter. We can see it, we can feel it. But all of that stuff is just 15% of all the matter in the universe. The other 85%, 85% is something called dark matter,
Starting point is 00:01:55 this kind of invisible, untouchable matter. But we don't know what it's actually made of. Scientists have been trying all kinds of things for decades to try and figure out what it is. But so far, they've got nothing. So what does it mean for science if we can't find it? If we can't answer arguably the biggest mystery in the universe. Today and unexplainable, I'm going to talk to a physicist who spent years looking for this stuff,
Starting point is 00:02:24 and then realized he couldn't do it anymore. So he quit. Because he started asking questions that went way beyond what he initially thought science was for. And stick around to the end of the world. episode for an update on some dark matter news. Joseph Howlett, thanks for coming on the show. Thanks for having me. So you are a science writer now.
Starting point is 00:03:06 You used to be a physicist. What made you want to be a physicist? What got you so excited about it in the first place? Yeah, I mean, I always like these kind of big questions, like the questions humans have always asked. Like, how did we get here? What is stuff made of? I had that instinct always to go deeper, right? Like, if you're in chemistry class, you hear that everything's made of atoms.
Starting point is 00:03:29 And then you hear that atoms are made of electrons swirling around a nucleus. Then you hear that the nucleus is made of protons and neutrons. And then you ask, well, what are those made of? They say you have to take physics. Right. So if you do this enough times, you end up with a PhD in physics. And then you very quickly learn that there's a lot of things that we don't know. And you run up against that.
Starting point is 00:03:45 Exactly, the unexplainable. And when you actually become a working scientist, that's the stuff you work on. So the decision I had to make is which of those questions to work on. And for me, it was obvious that it was going to be Dark Matter, at least like when I heard that everything I had been learning about is only one-sixth of everything, at least for the picture I had of what science is supposed to do, that came as a real shock. So it's been a while since we've talked about it on the show. We had our first episode of the show on Dark Matter, but what is Dark Matter and why did you get so excited about it? Yeah, so dark matter is a thing that we know is there, but we don't know what it's made of. Really, it's thanks to Vera Rubin.
Starting point is 00:04:29 In the 70s and 80s, she cataloged how fast stars are moving around their galaxies. So she looked at all the stars, they're orbiting the center, the same way we're orbiting our sun, right? But the problem with every galaxy is that all the stars are moving way too fast, especially the stars on the outside, compare it to like a race car on a racetrack, right? if a car is going around the track and it speeds up and speeds up and speeds up,
Starting point is 00:04:53 eventually the tires won't be able to hold it on anymore and it'll fly off the track. And when Vera Rubin looked at all the stars and all the galaxies, she was like, they're all going way too fast. They should all fly off into space. Everything, including our sun, should be flying off into space because there's not enough stuff inside
Starting point is 00:05:10 to be holding it at the speed that it's going at, right? So either we don't understand gravity and all the laws of how much stuff it takes to hold a thing in going that fast, we're wrong about. Or there's stuff we're not seeing that's gravitating. That's extra glue, like holding that thing in. So if you imagine a race car, it can go way faster if you like stick a stake in the middle of the track and tie a rope to it, right? And it's like there's some additional thing we're not seeing that's holding everything in, that's holding all this stuff. And that's dark matter. That's what we call dark matter
Starting point is 00:05:44 just because we can't see it and we have no idea what it is. It's just a blank. it term for this missing stuff. So it's matter that interact with stuff via gravity, right? It can pull in these fast-moving stars at the edges of galaxies via gravity, but we can't see it. Why can't we see it? We don't know that. I mean, we just know that whatever this stuff is, it doesn't interact with light.
Starting point is 00:06:11 It's somehow invisible. And when astronomers, physicists do calculations, the only way to have enough of this stuff to make sense of the way galaxies move, that's how they get to 85% of all matter is dark matter, or five-sixths of all the matter is dark matter. Yeah, that's where this number comes from, this why I say five, six of the universe is missing. It's because that's how much stuff you would need to add,
Starting point is 00:06:35 how big that cloud would have to be, to explain how fast the stars are moving. And since Vera Rubin, we've established it in all kinds of other ways. Like, you can make maps of the mass distribution of faraway things by looking at how they bend light around them. Our earliest picture of the universe, which is called the cosmic microwave background, it's like the light that was released very shortly after the Big Bang when the universe began to cool. That light tells us what matter there was then,
Starting point is 00:06:59 and it's very clear that there was five times more of some stuff we don't understand. Right. Like, there's all of this additional evidence, and all of it aligns with this five-sixth number. So why is it still such a mystery to us? Yeah, it's because we don't know what it is. I mean, like, it's a big thing, not. to know. Especially if you're like me, right? If you're asking these questions like, okay, what's in Adam? What's in that? What's in that? If you keep doing that,
Starting point is 00:07:24 like, you want to know what stuff is at a fundamental level. Dark matter, if you picture some galaxy, it's like this shadow realm that's on top of the galaxy. You can't see it. And it's only like interacting with it through the way it tugs on things, right, all together. Through gravity. But what is that a cloud of, right? I'm not satisfied that we know what dark matter is if we don't know what that cloud is. But scientists are trying to figure out what it is, right? They've been researching this for decades. Yeah, so one thing to say is that, like, shortly after Verarubin, there were these two explanations.
Starting point is 00:07:58 There's either we're wrong about gravity or there's this missing stuff. Over the decades, that first hypothesis has kind of fallen apart. It's very hard to adjust gravity in a way that makes everything make sense. All of this evidence we have. We're pretty sure we understand gravity pretty... Well, it's a good theory. Yeah. So there's this missing stuff, and there was this kind of arms race.
Starting point is 00:08:21 There was people trying to build detectors on Earth to detect this stuff that we know is going through us all the time, but we don't know what it is, right? So the next question is like, okay, let's figure out what it's made up by trapping it in a lab, right? That's how science works, right? Like there's this missing part of the universe, so you develop a theory that can explain it, and that gives you a testable hypothesis that you go build in a lab. And what's great for us is that theoretical physicists in the 80s already had an idea for a type of particle that might exist in the universe that exactly explained all the dark matter. Yeah, they were trying to map all potential particles, right? This is the standard model of physics. Yeah, the standard model of physics is the 17 building blocks, the Lego pieces that everything we know about is made of, right?
Starting point is 00:09:06 So it's the quarks that make up protons and neutrons. Electrons are one of these particles. And together these 17 particles build everything that we can see, right? But it only explains one-sixth of everything, right? Like we know that it doesn't account for this extra stuff, so we know that it's incomplete. And we had some kind of predictions, like there may be empty spots on the standard model,
Starting point is 00:09:28 and what you're saying is that one of those empty spots would be the dark matter particle. Yeah, it was really convenient. And physicists like convenience, right? It's Occam's Razor, like the simplest explanation is the one you go for first, right? And this is what's great about this theory they had in their desk drawer, is that
Starting point is 00:09:46 it interacts gravitationally. It goes through us like a ghost, right? Like we knew about dark matter. But very, very rarely, on rare occasion, the ghost becomes corporeal for just a second and smashes into one of our atoms. Wait, that's the theory? That's the theory.
Starting point is 00:10:02 This particle that they had in their desk drawer, it explains all the dark matter, but in addition to its gravitational pull, there's a very, very, very weak coupling to the normal stuff in the universe. So dark matter is going through us all the time. Very, very rarely, imperceptibly rarely, one of those particles smashes into one of our atoms.
Starting point is 00:10:20 We don't feel it. Got it. But that means that you can build a detector of regular matter to detect that. And that was key, right? Because that meant that, okay, we can on Earth look for this particle. And this is where your research
Starting point is 00:10:33 enters into the picture, right? This is when you became a physicist, what kind of experiments were you working on? What kind of experiments are out there to find the dark matter particle? I mean, the way things went down is Vera Rubin and others convinced us that there's this missing stuff.
Starting point is 00:10:49 And then theoretical physicists said, oh, we have an idea for what this missing stuff might be made of, and you can build a big detector. A detector is just a tank of atoms that the tank lights up when one of the atoms gets hit, right? I said... Get hit by a... by any thing.
Starting point is 00:11:07 Oh, by anything. Okay. So when we get hit by a dark matter particle, you don't notice. You have a tank of liquid xenon, for instance, which is a cryogenic liquid. It's kind of like liquid nitrogen that you play with in a lab. When a xenon atom gets hit by a particle, it lights up. So that's all a detector is. So they said, okay, if I put a detector on this table, it would see stuff all the time,
Starting point is 00:11:25 because there's particles coming from space. Got it. So you would never see the dark matter particle that interacts once in a year or something. Right. So it wouldn't work here, but it would work underground. So I was working to build this big dark matter detector underneath a mountain, one of Italy's biggest mountains. Okay.
Starting point is 00:11:43 Yeah. So dark matter would go through the surface. It would go all the way into this underground lab or wherever. And the idea would be that maybe there we could see dark matter hitting some other atom. It would go through this whole mountain in Italy. It would go deep into the center of the mountain. It would go into the lab. It would go into the detector.
Starting point is 00:12:03 and 99.99% of the time it would go through the detector without doing anything. But the idea is, once in a blue moon, if you wait long enough, you make the detector quiet enough, one of those dark matter particles will become corporeal, just at the right moment, smash into a xenon atom, light the detector up, and then we say, okay, we found dark matter. We know it's made of these particles. And then the problem solved, right?
Starting point is 00:12:26 Yeah, tell me about the mountain, the lab. What does this look like in Italy? It's an interesting commute. Like you pile into like a little fiat and you drive down these mountain roads. You go in the highway and the highway has a tunnel that goes through this mountain. But we don't go all the way through the tunnel. We go halfway through the tunnel. And then there's this turnout for the scientists.
Starting point is 00:12:47 It's like a little secret. There's a little secret entrance with these Italian guards who mispronounce your name. And Olet, they called me. Okay. And you know, you show them your badge. You go through. And then you're in this cavern. It's like a big underground cavern.
Starting point is 00:13:02 And it's kind of chilly, it's expansive. Is the ceiling like cave? It's cave. Oh, my God. Yeah, yeah, yeah. Yeah, it's cave. I mean, it's finished in different places, but you know that you're underground. It's a little claustrophobic if you're someone like me, but we'd never see the sun, basically, because you'd stay there most of the day when you're really working at it, yeah.
Starting point is 00:13:22 Wow. I think I have a photo of you. Is this you in Italy? Yeah, this was, I think, 2019, something like that. underneath the mountain, closing the giant detector. So you can see it's kind of a size of a very small sedan. So, like, this is full of xenon? It will be full of xenon.
Starting point is 00:13:40 So where I'm standing will be water, basically, and this thing will be contained in vacuum, because it has to be very cold, right? But first, you have to build it and close it up, and that's what we're doing in this picture. What do you think 2019 Joe is feeling at that point, looking at that detector? I mean, it was really invigorated.
Starting point is 00:14:00 to be, like, building the thing. Our experience were working really well. They were getting very sensitive. And we were about to make that jump to cover the region of predictions. That was exactly what the theorist predicted. It felt not probable. Like, I don't know that I would have put money on it. But there was optimism around.
Starting point is 00:14:23 Yeah, definitely. Then tell me when you started to feel differently. Yeah, so we ran this big detector, and I was working on the analysis. So you have all this data. You have, like, whatever, many months of this thing sitting quietly and looking for the light. And there was this one big Zoom call with my entire collaboration, people all over the world, hundreds of people on one video screen in all their different universities. And it was this moment where we were going to find out if the experiment worked or not.
Starting point is 00:14:57 It had already run for a long time. we had already built out this big method for analyzing whether or not the data contained dark matter. And all at once, we were going to push a button, and the experiment was going to tell us whether yes, you discover dark matter or no, you didn't. And I remember that moment when we pushed the button, we watched it churn through all this data and say,
Starting point is 00:15:18 no, you didn't find it. And I remember watching what seemed like despair washover everybody's face. I watched like the stages of grief in Fastball. motion. What did you see on people's faces? At first, like a kind of denial. Like, I think, I think everybody was like, it's okay. It's okay. Like instantly they went from, from, I think, a sincere belief that we had a good chance of seeing it to like, okay, well, it's not the end. We can build more. Like, Dark matter could just be a little more ghostly than we thought before.
Starting point is 00:15:50 Build a bigger detector. And we immediately started doing that. That was most of my PhD was building bigger and bigger detectors and waiting longer and longer. The bigger you, the detector build, the longer you wait, the more sensitive you become to this rare dark matter interaction. But that day had an impact, especially when I talked to young people who I was working with. So, you know, I was in Italy, I was going underground, and you would have these conversations over lunch, over dinner, and you would get the sense that, like, nobody actually thought the thing was going to work anymore. Like, the disinlusionment, at least among young people, was pretty universal.
Starting point is 00:16:25 The professors who had spent their whole career working on dark matter, they were. They showed more optimism. They showed more like, okay, well, maybe the next one. But especially all those young people who had seen that first failure, I think they were shaken. Their faith was shaken. Do you remember any of those conversations? Yeah, I mean, I started taking like an informal poll, right? I would ask people, so like, what do you think are the chances that this detector were building?
Starting point is 00:16:48 The next one, the bigger one, will find dark matter. And they would say zero. They would say, no, it's not going to happen. So what does it mean for science if we never crack what might be the biggest, mystery out there. We'll get into all that after a quick break. Support for the show comes from Square, the business platform that aims to help sellers become neighborhood favorites. These days, buying stuff is pretty easy with tap to pay. Maybe it's a breakfast sandwich at the corner cafe, a lunch break haircut, or some wall art that you picked up
Starting point is 00:17:32 spontaneously on your way home. Square says every day we interact with businesses that rely on Square to make those transactions so fast and so simple. Square brings payments, point of sales, inventory, staffing, and online sales together in one easy-to-use system. Their hardware is sleek, simple. It comes with software that's intuitive to use in your day-to-day operations. And it also has AI-powered tools that help automate routine tasks, giving you more time back as a seller. Whether you are just starting out or growing from one location to many, Square can hope. help you out. You can sell online, in store, or both, and customize your setup as your business evolves. Right now, listeners can get up to $200 off Square Hardware when you sign up at Square.com
Starting point is 00:18:20 slash go slash unexplainable. That is Square, S-Q-U-A-R-E dot com slash go-explanable. Get started with Square and build a setup that works the way you do. Picture it. Summer, you and your girls at your favorite patio bar. The sun's out. The breeze is perfect, and you're looking stunning in that new sundress. And what are we drinking? A Kampari Spritz. It's just Kempari, Prisko, and Soda Water. Bold, iconic, and perfectly bitter, just like you. Check out official cocktail recipes at Kampari.com. Kampari Sprits. Stay Bitter. Kampari Liquor, 24% alcohol by volume 48 proof. 2026, Kampari America, New York. Please enjoy responsibly. So blend wellness into your coffee routine with the coffee plus range infused with functional benefits.
Starting point is 00:19:21 Choose the coffee you love with added B vitamins, like coffee plus B12 to help support immune function, and coffee plus B6 to keep your day moving. Or go with the flow and choose ginseng delight. Our new double espresso with ginseng extract. Whatever lies ahead, don't change your morning. Let your morning change you. Discover coffee plus on espresso.com. So it seems like there's two possibilities here.
Starting point is 00:19:58 Either we are failing as a scientific community or struggling, I don't want to say failing, to detect the particle. We're not building big enough or quiet enough detectors. Or there's something about the nature of dark matter that makes it, like, impossible to detect. Yeah, I mean, it could be that it's just this shadow realm that only interacts with our world through its gravitational pull. If that's the case, we'll always be in this place where we know it's there and we don't know what it's made of. Yeah. I mean, you sent me a conversation you had with Siska DeBarda Maker.
Starting point is 00:20:36 She's a philosopher. And she said something that really stuck out to me. It is entirely possible that dark matter only interacts gravitationally. Yeah. And that would be a worst case scenario for physics. But, like, nature doesn't have to play nice. What do you think about that line? Nature doesn't have to play nice.
Starting point is 00:20:54 Unfortunately, what Siska's saying is that nature doesn't have to have made a dark matter particle that you can ever know what it's made of, right? Like, we can only know what something's made of is if we can trap it in a detector on Earth. Right. That's how we answered all the questions I asked in high school and college, right?
Starting point is 00:21:11 Mm-hmm. We can never answer those questions for dark matter if it only interacts gravitationally. Right. Because you can never trap it in a detector. Gravity is too weak of a force. It just seems like such a tantalizing situation that we can see it
Starting point is 00:21:24 doing all of this stuff. We see it holding galaxies together and spinning them faster than they should be, and we can't capture it. We can't detect it. It's horrible. Billions of them are going through us all the time. But we'll never know what they are. That's what I'm saying. For me, that's, that runs up against my entire picture of what science is supposed to do. Yeah. So you've talked to a bunch of scientists and philosophers of science. Did anyone disagree with your perspective that science can't tell us the secrets of the universe, that maybe it's unreasonable to expect science to reveal itself in the ways we wanted to reveal it? You know, when you put it that way, when you ask a scientist, does the universe owe us explicability, comprehensibility? They'll say, of course not. But if you ask them in
Starting point is 00:22:17 any one situation, what do you think is going to happen with dark matter? including my former peers, the people who said zero percent that our experiments would work, all of them, two of one, felt that at some point we'll figure it out. I don't know what's going to happen, but some genius will come along, some Einstein, and change the paradigm, and we'll learn that we were wrong about everything,
Starting point is 00:22:37 and everything will suddenly make sense. All the physicists I talked to had this faith that I used to have. And there's good reason for that. There's a reason for optimism. It has done a lot of things. We've overcome a lot of mysteries. But even if I'm wrong, and I might eat my words tomorrow, I'd love us to find dark matter. There's a wall somewhere is what I've learned.
Starting point is 00:22:59 Maybe this isn't it, but it could be this. You used the word faith. Sorry. No, it's fine. It makes sense to me. Is that what this feels like to you? Does it feel like some of the scientists you talk to have faith that you no longer have in what science is and how it's supposed to work?
Starting point is 00:23:21 Yeah, I mean, I threw that word at some of them. My advisor, Eleanor Pre-Lai, she threw it back at me. She said, how are you so certain, Joe, that we will never find this thing? And it's true, I think I've been so
Starting point is 00:23:36 disillusioned that I've maybe lurched into pessimism. Another philosopher I talked to told me to lighten up. That was his professional advice. But I've become convinced that even if dark matter gets discovered tomorrow, which could happen, I could eat my words, right?
Starting point is 00:23:53 I would love to. But even if dark matter gets discovered tomorrow, I now feel that there will be another wall down the road. If the wall we can't penetrate in our understanding isn't dark matter, it will be something else. We'll never understand everything. It's something that sounds obvious once you say it, but the fact that there is means that I was asking the wrong thing of science.
Starting point is 00:24:16 Means that I was wrong about what science is. And maybe that means that there's other people who are misunderstanding the purpose of science. Maybe science is the thing that tells us that we can't know everything. And like maybe that's the point of science. Maybe we're verging a bit into religion here, but it kind of feels okay. You know, I think about Maimonides, the medieval Jewish philosopher, his conception of God is that God is unknowable and the reason God is anthropomorphized in the Bible is because God is fully unexplainable.
Starting point is 00:24:50 And I feel like for him, that was meaning, right? And you're telling us that science maybe has gotten us to a point where it's shown us that the universe is at some deep level unexplainable or mysterious or out of reach. And maybe that is, that's it. Maybe that's like a reminder to us that we need to be humble. and we are not the kind of like conquerors marching over the universe, explaining everything. Like maybe that actually is the meaning.
Starting point is 00:25:28 I don't know. I'll go there because you invited me to go there. I think in medieval times, right, in the Christian Dark Ages, for example, there was all these weird mystics saying that God is unknowable and the universe is unknowable and that is God and all this stuff, right? They were really comfortable, not only comfortable with unknowing, they worshipped unknowing, right, in that era. And then the Enlightenment happened, and we were kind of like,
Starting point is 00:25:56 well, never mind, actually, we can kind of know everything. It was working pretty well. It was working for a while. And I think we might have over-adjusted to now we're in this time where we could raise an idiot like I used to be who thinks that eventually will figure out everything. And, like, I think we could learn some lessons from those weird medieval mystics
Starting point is 00:26:16 who, of course, like, it's great everything we've gotten from science, but we shouldn't mistake that for meaning. And I think there's a lot of meaning in this wall, in the unknowable. One thing I want to be clear about, though, I think there's a way that someone might hear this conversation and say, Joe is saying that scientific research, specifically physics research, is pointless. or not going to go anywhere.
Starting point is 00:26:48 When you're looking at these experiments to find dark matter particles or building a bigger particle collider than CERN, are you saying that those experiments shouldn't keep going on? Or are you saying that your personal motivation doesn't necessarily line up with those experiments? Yeah, I'm really glad you brought this up, actually, know because like I think, you know, science funding is in crisis right now. Yeah.
Starting point is 00:27:19 Including fundamental science funding. Right. And like it's important to say that the reason we had this discussion is because of science, right? Like because of Vera Rubin's work and everybody that followed her and the 40 years we just had a failure of trying to find dark matter. It's how we're able to have this conversation. And the next 40 years of basic science will enable better, more informed conversation. about the limits of knowledge and what we can learn from them. Like, I love science research, and not enough of it is happening.
Starting point is 00:27:53 That's the problem. I mean, I'm not saying we shouldn't build the next thing. I don't know what the next thing we'll find. It might find something crazy. We should build more next things so that we can get more questions and prove me wrong, right? Like, I would love for us to find dark matter. I would love to be wrong. I just think we should spend some fraction of our time stepping back and saying,
Starting point is 00:28:13 well, we might not ever know everything, you know. I guess I want to bring this back to you. Well, you're no longer a physicist. I mean, once a physicist, always a physicist, right? But at a certain point, you decided to stop doing research and become a science writer. Do you remember the moment you decided to stop being a researcher? I mean, there was a bit of an identity crisis, right?
Starting point is 00:28:38 Like, I had decided that this is how you make meaning. And I was learning that it just is. isn't. I'm not an Einstein. I can't go step back and reframe all of physics. But maybe I could talk about people who are. I knew I would never be able to leave science behind. I mean, you love it. I love it. And I especially love this edge of what we can know, right? But yeah, I had to give up on the idea that I was going to penetrate the wall, right? That I was part of this grand program that was chipping away slowly, marching along human knowledge until we figure out everything. And that made the world way scarier to me. But I think it also ultimately
Starting point is 00:29:21 made it more beautiful. This feels like a very personal journey you've been on of what you wanted from science to find out about the universe. What do you think you've found out about yourself? That I'm deeply uncomfortable with not knowing things. And maybe that all of us are. And I think I've learned that that's the thing I should be engaging with, right? That discomfort, what it means about me. And now that's what I spend all my time thinking about, what we don't know, what we can and what we can't. And it still makes me uncomfortable.
Starting point is 00:30:02 But I think it also makes me better because of humility. it also makes me appreciate people more. Like, I'm not looking out there or down there or at the fundamental reality anymore for meaning. I'm looking around me. Are you still searching for meaning? I feel like you've searched for meaning in this one way. Now you're saying, like, oh, I can't chip away at the wall,
Starting point is 00:30:31 maybe admire the wall, but do you still feel like you're searching? Yeah, I think this is a weird place we've been thinking. thrown down, right? And left to figure it out. And, like, yeah, I'm still looking for it. I don't know that I've found it, but, like, I feel like I scratch the surface every now and then. Like, when you hear an amazing story, when you think about dark matter, like, it's
Starting point is 00:30:54 the closest I feel to, yeah, like a deep, real meaning. Maybe someday we'll figure it out. Yeah, that'll be great. We'll have you back on the show. I would love to come, eat my words. We can just say, hey, we know the meaning of life. everybody. Until then, though, Joe, thanks so much for coming on the show. Thanks so much. It was so fun. All right, Joe, thank you for coming back to talk with me. We taped the episode a couple weeks ago,
Starting point is 00:31:24 and then researchers at this huge underground dark matter experiment in South Dakota just made this big announcement about something that they discovered a few years ago. They noticed that this particle hit another particle in a way that they can't really explain. So did we just discover dark matter? I think when we talked, I told you I might eat my words tomorrow. I didn't like literally mean tomorrow. No, we definitely don't know that we found dark matter. And unfortunately, I'm pretty sure, and I think most experts would tell you
Starting point is 00:32:08 they're being honest that they're pretty sure we didn't. Like, I would bet $1,000 against this being Dark Matter. It's a bet I would love to lose. Like, I would love to be wrong about that. But I just think it's very unlikely. But it is still the most interesting thing to happen in one of these experiments for a long time. So are people so excited just because this is the first time in a long time, anything interesting has been found?
Starting point is 00:32:36 These experiments have been looking for literal decades. for this thing that we know is everywhere, but we can't find, and they've come up with nothing. So it's very easy to get excited about any little thing that you see. It doesn't mean that it's dark matter. And that's not how science works, right? Like, you learn, in elementary school,
Starting point is 00:32:53 the scientific method, you make a hypothesis, then you go build an experiment to confirm or disconfirm that hypothesis. That's not what happened here, right? Like, the dark matter of this experiment was looking for, it didn't find. It found something else unusual. But that's not confirming or disconverming its original hypothesis, right?
Starting point is 00:33:14 If you build an experiment that's sensitive enough, deep enough, run it for long enough, eventually you are guaranteed to see something you don't understand. It doesn't mean you found dark matter. Does this make you rethink your feelings at all with the search in general? Like maybe this is that ray of hope we needed in order to build bigger and deeper and more sensitive detectors so that we will find dark matter. I mean, I am excited about this event, right? It's the most exciting thing to happen in the dark matter detector in a long time.
Starting point is 00:33:47 But also, I know what's going to happen to this field, right? It's going to take us five years to figure out what actually happened. And it's not the first time we've seen something unexplained. It's been a long time, but it's not the first time. And it always turns out to be nothing. Whether or not this is the wall, I think there is one. And I think we still need to be grappling with the questions about science that that raises, whether or not we found dark matter.
Starting point is 00:34:12 And I hope we have. Well, Joe, thanks for getting back on the line for the update. I do hope at some time in the near future you do eat your words, and we get you back on the show. And we do actually discover dark matter. I'm absolutely down to come do my Mayo Colpa on your podcast. I'd love to. All right. Until next time.
Starting point is 00:34:37 Thanks, Tom. If you want to see this episode on video, head over to Netflix. This was our second episode of our series with Scientific American. If you want to read more about this and other impossible questions, go check out their special issue. You can find it in print or on their site at Scientific American.com and check out their excellent podcast, Science Quickly. This episode was produced by Valerie Schenckman and me, Noam Hassenfeld.
Starting point is 00:35:06 It was edited by Joanna Solitarev with help from Meredith Hoddonaut, who runs the show. Our video editor is Jacob Reynolds. Our animator is Kareem Karea. Our fact-checker is Melissa Hirsch. Our studio engineers are Ibrahim Ocich and Joe Nebris. Mixing and sound design by Christian Ayala, music from me. And Bert Pinkerton leaned against a wall in the passageway. She wasn't sure which path she should take. She lay down and then she heard it, faintly, in the darkness. Special thanks as always to Brian Resnick for co-creating the show with me and Bird. If you have thoughts about the show, we would love to hear from you. You can email us at Unexplainable at Vox.com, or if you want to support the show, join Vox.
Starting point is 00:35:54 Become a member. Just go to Vox.com slash members. And if you signed up because of us, let us know. It would make us very happy. Unexplainable is part of the Vox Media Podcast Network, and we'll see you right back here next time. Running a business shouldn't feel like surviving a software group project, one app for accounting, another for inventory, another for sales, and somehow, none of them talk to each other. That's where Odo comes in, an all-in-one business management software that brings every part of your business together. From sales and accounting to inventory and marketing, all in one powerful platform, no messy integrations, no bouncing between tabs and, best of all, no spreadsheets. Stop managing software and start managing your business with one unified system.
Starting point is 00:36:44 Try for free today at Odu.com slash Vox. That's ODO.com slash Vox. Going on vacation? We're here for it. With kids, who turned the backseat into a courtroom drama over whose tablet is louder, whose charger is faster, and while watching the same cartoon for the hundredth time is a human right? Yep, we totally have vehicles to handle that. Because whether it's a road trip or a business trip,
Starting point is 00:37:12 where your flight's delayed, your phone's at 2% and your dinner is, weather is open? Yeah, here for that too. Enterprise, we're here for it.

There aren't comments yet for this episode. Click on any sentence in the transcript to leave a comment.