James Webb Finds the Chemical Seeds of Life in a Distant Galaxy

<v Speaker 1>Welcome to Bedtime Astronomy. Explore the wonders of the cosmos
<v Speaker 1>with our soothing Bedtime Astronomie podcast. Each episode offers a
<v Speaker 1>gentle journey through the stars, planets, and beyond, perfect for
<v Speaker 1>unwinding after a long day. Let's travel through the mysteries
<v Speaker 1>of the universe as you drift off into a peaceful
<v Speaker 1>slumber under the night sky.
<v Speaker 2>You know, there is a very specific, a very human
<v Speaker 2>bias when it comes to exploration. Oh yeah, yeah, I
<v Speaker 2>mean when we look for anything, treasure, secrets, even just
<v Speaker 2>you know, information, we tend to look where the light is.
<v Speaker 3>Right the old joke the drunk guy looking for his
<v Speaker 3>keys under the street.
<v Speaker 2>Light exactly, not because that's where he lost them, but
<v Speaker 2>because that's the only place he can see.
<v Speaker 3>It's a survival instinct.
<v Speaker 2>Really, yeah.
<v Speaker 3>We're visual creatures. If something is dark or buried, or
<v Speaker 3>hidden behind a curtain, our default assumption is that there's
<v Speaker 3>nothing there.
<v Speaker 2>Or at least nothing worth the effort of trying to exactly.
<v Speaker 3>We prioritize the visible the invisible. Well, that requires a
<v Speaker 3>whole different set of tools.
<v Speaker 2>And in astronomy, that bias is it's a killer because
<v Speaker 2>the universe is fundamentally a dusty, messy place.
<v Speaker 3>Incredibly messy.
<v Speaker 2>There are entire galaxies, i mean, whole chapters of cosmic
<v Speaker 2>history that are basically locked inside these giant vaults of
<v Speaker 2>gas and dust, and for the longest time we've just
<v Speaker 2>been staring.
<v Speaker 3>At the vault door and guessing which is you know,
<v Speaker 3>rarely good science. You can measure the heat coming off
<v Speaker 3>the vault maybe, but you don't actually know what the
<v Speaker 3>engine is inside.
<v Speaker 2>Is it a star factory, a dying quasar, something completely new.
<v Speaker 2>You just don't know.
<v Speaker 3>We've had models, of course, lots of them, but a
<v Speaker 3>model without direct observation is, at the end of the day,
<v Speaker 3>just a sophisticated wish.
<v Speaker 2>Well, today's discussion is about what happens when you finally
<v Speaker 2>get the key to that vault. We're looking at a
<v Speaker 2>paper published in Nature Astronomy in February twenty twenty six.
<v Speaker 2>That's a big one, it really is. It's a study
<v Speaker 2>that takes the most advanced telescope ever built, points it
<v Speaker 2>at one of these locked doors and essentially turns on
<v Speaker 2>the X ray vision.
<v Speaker 3>And what they found inside wasn't just oh, look there's
<v Speaker 3>a super massive black hole. I mean, we kind of
<v Speaker 3>knew that already.
<v Speaker 2>We expected that part, right.
<v Speaker 3>The real surprise was the chemistry. It completely changed our
<v Speaker 3>understanding of how organic matter, the building blocks for us,
<v Speaker 3>behaves in the most extreme environments in the universe.
<v Speaker 2>And that's the hook for me. We're not just talking
<v Speaker 2>at gravity and physics today. We are talking about a
<v Speaker 2>chemical factory. We're talking about the ingredients for life being
<v Speaker 2>cooked up in well, in the last place you would
<v Speaker 2>ever think to look for them.
<v Speaker 3>It's like finding a gourmet kitchen inside an active volcano.
<v Speaker 2>That is a surprisingly good analogy.
<v Speaker 3>It really challenges that whole warm little pond idea we
<v Speaker 3>all learn, you know, the Goldilocks model that life ingredients
<v Speaker 3>need a calm, quiet, gentle place to form.
<v Speaker 2>This study suggests they might actually be born in the fire.
<v Speaker 3>Did it.
<v Speaker 2>Yeah, So let's lay out what we're looking at today.
<v Speaker 2>We have the main paper from Nature Astronomy, which was
<v Speaker 2>led by a team from the Center for Astrobiology that's
<v Speaker 2>cab and CiCi Inta.
<v Speaker 3>And we also have the crucial modeling data that came
<v Speaker 3>in the University of Oxford.
<v Speaker 2>And that modeling is key, isn't it, Because that's where
<v Speaker 2>the mystery really kicks in.
<v Speaker 3>It is the observational data told them what was there.
<v Speaker 3>The models told them that it shouldn't be there, and
<v Speaker 3>that gap, that discrepancy, that's where the discovery is.
<v Speaker 2>I do love a good scientific paradox. Okay, let's start
<v Speaker 2>with the target. We're not looking at Andromeda or some
<v Speaker 2>famous galaxy. We're looking at an object with the very
<v Speaker 2>catchy name of IRACE zero seven two five to one.
<v Speaker 2>Zero two four.
<v Speaker 3>Eight rolls right off the tongue. But that Irace part
<v Speaker 3>of the name actually tells you a lot of the backstory.
<v Speaker 2>IRACE that was the infrared astronomical satellite right back in
<v Speaker 2>the eighties.
<v Speaker 3>That's the one. It was the first mission to do
<v Speaker 3>a full survey of the sky in infrared light, and
<v Speaker 3>it found all these objects that were just blazingly bright
<v Speaker 3>in infrared, but when you looked with a regular telescope,
<v Speaker 3>you saw almost nothing.
<v Speaker 2>They gave them a name, didn't they, ulargygulargies, Yeah, ultra
<v Speaker 2>luminous infrared galaxies. So to a normal telescope, this thing
<v Speaker 2>I RaSE zero seven two five to one, it looks
<v Speaker 2>like just a faint smudge.
<v Speaker 3>Very faint dark smudge, maybe a little reddish blob if
<v Speaker 3>you're lucky, but if you could see and heat infrared,
<v Speaker 3>it would be one of the brightest things in the sky.
<v Speaker 2>It's screaming with energy, and that energy, that visible light,
<v Speaker 2>is being.
<v Speaker 3>Trapped exactly trapped behind just vast amounts of gas and dust.
<v Speaker 2>Okay, So let's get into the specifics of this galaxy.
<v Speaker 2>The paper describes a very particular architecture. Right at the nucleus,
<v Speaker 2>it's not just a big blob of stuff, No, it's layered.
<v Speaker 3>Think of it like an onion. Right at the very center,
<v Speaker 3>at the absolute core, you have what they call the
<v Speaker 3>hot component, the engine room. The engine room, it's the
<v Speaker 3>immediate area around the supermassive black hole, incredibly dense, chaotic,
<v Speaker 3>super hot. In their diagrams, it's this deep dark red.
<v Speaker 2>Okay, so that's the core. What's the next layer out.
<v Speaker 3>The warm layer. The gas density drops a bit here,
<v Speaker 3>but it's still extremely energetic. This is where you find
<v Speaker 3>what they call gas phase molecules just zipping around. It's
<v Speaker 3>a bit cooler, shown as orange and yellow.
<v Speaker 2>And then wrapping a whole thing up.
<v Speaker 3>Is the cold envelope. This is the shell, a huge
<v Speaker 3>thick shell of dust different kinds of ices and cold gas.
<v Speaker 3>And this is the part that acts like a blackout.
<v Speaker 2>Curtain, the vault door we were talking about precisely.
<v Speaker 3>For decades astronomers have been trying to get a clear
<v Speaker 3>look through that curtain to see what the machinery inside
<v Speaker 3>is actually doing.
<v Speaker 2>Which brings up the obvious question. We've had powerful telescopes
<v Speaker 2>for a while, we've had Hubble for decades. Why couldn't
<v Speaker 2>Hubble just zoom in and see through the curtain.
<v Speaker 3>It comes down to the physics of light waves. Hubble
<v Speaker 3>mostly sees in visible light the same stuff our icee.
<v Speaker 2>The rainbow ROYGBIV.
<v Speaker 3>That's it. And the problem is that the dust greens
<v Speaker 3>floating around in space are roughly the same size as
<v Speaker 3>the wavelength of visible light, so they block it. They
<v Speaker 3>block it perfectly. Photon of visible light hits a dust grain,
<v Speaker 3>it either gets absorbed or it scatters. It's like driving
<v Speaker 3>into a thick fog with your high beams on. The
<v Speaker 3>light just stops. It creates a wall.
<v Speaker 2>So Hubble looks at IRI's zero seven two five to
<v Speaker 2>one and sees a wall of dust.
<v Speaker 3>A dark, impenetrable wall. To see through that fog, you
<v Speaker 3>need light with a much longer wavelength light that can essentially,
<v Speaker 3>you know, snake its way around those dust grains without
<v Speaker 3>bumping into them.
<v Speaker 2>You need infrared.
<v Speaker 3>You need infrared.
<v Speaker 2>And that brings us to the hero of the story,
<v Speaker 2>the James Webb Space Telescope.
<v Speaker 3>JWST, the machine that was literally built to see the
<v Speaker 3>invisible universe.
<v Speaker 2>We talk about this telescope all the time, but I
<v Speaker 2>think it's worth pausing on why it's so perfect for
<v Speaker 2>this exact job. It's not just about having a bigger
<v Speaker 2>mirror than Hubble, is it not at all.
<v Speaker 3>It's the instruments and the fact that the telescope itself
<v Speaker 3>is incredibly cold, so it doesn't blind itself with its
<v Speaker 3>own heat. For this study, the two key players were
<v Speaker 3>NIRI and n our SPEC.
<v Speaker 2>NRI is the mid infrared instrument.
<v Speaker 3>Correct and ANTARSPEC is the near infrared spectrograph, and by
<v Speaker 3>using them together, the team could look at a very
<v Speaker 3>specific slice of the light spectrum from about three microns
<v Speaker 3>all the way out to twenty eight microns.
<v Speaker 2>Okay, so why is that range three to twenty eight
<v Speaker 2>microns a magic window? Why not fifty or one hundred?
<v Speaker 3>Because that range is the fingerprint region for organic chemistry.
<v Speaker 3>This is really really important to get. Molecules aren't just
<v Speaker 3>static little balls. They vibrate, they stretch, they rotate, they're dancing.
<v Speaker 3>They're constantly dancing, and every time they make a specific move,
<v Speaker 3>a stretch, a bend, they absorb or emit light.
<v Speaker 2>At a very very specific frequency, like a tuning fork
<v Speaker 2>or a musical note.
<v Speaker 3>It's exactly like a note. A methane molecule sings at
<v Speaker 3>a totally different pitch than a benzene molecule ye, And
<v Speaker 3>it just so happens that all those unique notes, those
<v Speaker 3>chemical signatures, they fall almost entirely within that three to
<v Speaker 3>twenty eight micron window.
<v Speaker 2>So if you want to listen to the organic chemistry station,
<v Speaker 2>you have to tune your radio to that specific frequency.
<v Speaker 3>And for the first time in human history, with JWST,
<v Speaker 3>we had a radio that was sensitive enough to pick
<v Speaker 3>up that faint signal from a galaxy millions of light
<v Speaker 3>years away.
<v Speaker 2>It's incredible. The program I d for this was JWSTGU
<v Speaker 2>three three sixty eight. They just they pointed the scope,
<v Speaker 2>opened the shutter, and let those infrared photons which had
<v Speaker 2>been traveling fer eons finally hit the detector.
<v Speaker 3>And the data they got back wasn't just a pretty picture.
<v Speaker 3>I mean, they did make a nice false color image
<v Speaker 3>using different silters to help visualize the structure.
<v Speaker 1>Right.
<v Speaker 2>I saw that they used blue for two microns, green
<v Speaker 2>for two point seven to seven, and red for three
<v Speaker 2>point five six.
<v Speaker 3>Yeah, that helps you see where different materials are. But
<v Speaker 3>the real treasure, the scientific gold, was in this spectrum.
<v Speaker 2>The squinkly lines the graph with all the spikes and dips.
<v Speaker 3>That's where the chemistry lives. Each one of those spikes
<v Speaker 3>is molecule shouting I'm here.
<v Speaker 2>So let's open the box. They peered behind the curtain
<v Speaker 2>into the heart of this shrouded nucleus. What did they find?
<v Speaker 2>The paper makes it sound like they found a chemistry
<v Speaker 2>set that just shouldn't exist.
<v Speaker 3>There, that's a good way to put it. They found
<v Speaker 3>an inventory that was frankly shocking. In these incredibly high
<v Speaker 3>energy environments, right next to a supermassive black hole, you
<v Speaker 3>expect fragile molecules to just be ripped to shreds, right.
<v Speaker 2>You expect to see just like individual atoms, maybe some
<v Speaker 2>really simple tough molecules like carbon monoxide.
<v Speaker 3>That was the prediction. But what they found was, and
<v Speaker 3>this is the quote from the paper, an extraordinarily rich
<v Speaker 3>inventory of small organic molecules.
<v Speaker 2>Okay, let's run down the list. What was on it?
<v Speaker 3>First? Up, benzene CJ benzene.
<v Speaker 2>That's the ring, isn't it? The hexagon of six carbon atoms.
<v Speaker 3>Classic aromatic ring. It's very stable, which helps explain why
<v Speaker 3>it can survive. But it's also the fundamental building block
<v Speaker 3>form much larger, more complex structures called PAHs.
<v Speaker 2>So finding benzene is like finding a perfectly formed brick.
<v Speaker 2>It tells you that you're not just looking at a
<v Speaker 2>pile of sand. You're looking at something that.
<v Speaker 3>Has structure precisely. It's the scaffolding for more complex chemistry.
<v Speaker 2>Okay, benzene. What else in there?
<v Speaker 3>They found the entire acetylene family. They found acetylene itself,
<v Speaker 3>which is CROs than dicetylene CROs and even tricetylene ciars.
<v Speaker 2>Wait, so they're not just finding a molecule, they're finding
<v Speaker 2>a progression. The chain is actively growing.
<v Speaker 3>It looks that way. Yes, Finding that sequence two carbons
<v Speaker 3>then four than six is a huge clue. It tells
<v Speaker 3>you that carbon atoms are actively linking up. They're polymerizing,
<v Speaker 3>building longer and longer molecular skeletons.
<v Speaker 2>And this is happening in the middle of this chaotic
<v Speaker 2>high radiation storm, around a black hole.
<v Speaker 3>In the heart of the storm.
<v Speaker 2>Yeah.
<v Speaker 3>They also found plenty of methane chair which is a
<v Speaker 3>classic simple hydrocarbon. But the real headliner, the detection that
<v Speaker 3>got all the astrochemists talking, was the methyl radical.
<v Speaker 2>Okay, you're gonna have to help me with this one.
<v Speaker 2>To a non chemist, h sounds almost exactly like methane.
<v Speaker 2>Ch It's just missing one little hydrogen atom. Why is
<v Speaker 2>the radical part so important?
<v Speaker 3>It's that missing hydrogen that changes everything. Stable molecule like
<v Speaker 3>methane is. It's chemically satisfied. It's electrons are all paired up.
<v Speaker 3>It's happy, doesn't really want to react with anything. It's
<v Speaker 3>inert mostly yes. But a radical, because it has an
<v Speaker 3>unpaired electron, is chemically anxious. It is incredibly reactive. It
<v Speaker 3>is desperate to grab onto something to complete his electron shell.
<v Speaker 2>That doesn't stick around for long on Earth.
<v Speaker 3>If you create a methyl radical in a lab, it
<v Speaker 3>vanishes in a fraction of a second. It just instantly
<v Speaker 3>reacts with the first thing. It touches. It's a chemical ghost,
<v Speaker 3>A ghost.
<v Speaker 2>I like that. So finding a whole population of these
<v Speaker 2>ghosts floating around in deep space is weird.
<v Speaker 3>It's extremely weird. It implies that there must be some
<v Speaker 3>process that is producing them constantly and at a very
<v Speaker 3>high rate. You're not seeing an old relic. You're seeing
<v Speaker 3>the fresh smoke from a chemical fire that is burning
<v Speaker 3>right now.
<v Speaker 2>And the paper points out this is the first time
<v Speaker 2>the methyl radical has ever been detected outside our own
<v Speaker 2>Milky Way galaxy.
<v Speaker 3>First time ever we've seen it in some nearby star
<v Speaker 3>forming cloud within the Milky Way. Yeah, to see it
<v Speaker 3>this clearly in a distant uliarg deep inside its obscured nucleus,
<v Speaker 3>that is a massive technological milestone for JWST.
<v Speaker 2>It proves this kind of reactive chemistry isn't just a
<v Speaker 2>local phenomenon, it's universal, exactly. So we've got this amazing
<v Speaker 2>list of gases, benzene, the acetylenes, methane, these ghosts like radicals.
<v Speaker 2>But the vault wasn't just filled with gas, was it.
<v Speaker 3>No, not at all. The spectrum also showed very strong
<v Speaker 3>signatures of solid state materials. They saw water ices, which
<v Speaker 3>you know we might expect to find in that cold
<v Speaker 3>outer envelope. Sure, that makes sense, but they also found
<v Speaker 3>what they call carbonaceous.
<v Speaker 2>Grains, which is a fancy word for soot.
<v Speaker 3>Basically, yeah, cosmic, so very tiny dust grains made it
<v Speaker 3>almost pure carbon.
<v Speaker 2>So paint the picture for me. If I could magically
<v Speaker 2>stand inside the nucleus of Ira ser seven two f
<v Speaker 2>F one, which obviously I couldn't, what would I be
<v Speaker 2>seeing around me?
<v Speaker 3>You'd be in a swirling, chaotic environment. It's incredibly hot.
<v Speaker 3>There are these vast, thick clouds of it and dust,
<v Speaker 3>completely blocking your view of any stars. But mixed into
<v Speaker 3>that gas swirling all around you are these complex organic
<v Speaker 3>molecules benzene rings spinning past methane gas drifting by a
<v Speaker 3>stlene chains, forming and breaking. It is a chemical soup
<v Speaker 3>of an unbelievably high density.
<v Speaker 2>A soup is a great metaphor. But this is where
<v Speaker 2>we get to the plot twist in the story because normally,
<v Speaker 2>if you find a soup, you assume there's a chef
<v Speaker 2>and you know the recipe. But when the researchers ran
<v Speaker 2>the numbers on this soup, the recipe didn't.
<v Speaker 3>Work, and that brings us to the puzzle. This is
<v Speaker 3>where the science gets really really interesting. Doctor Ismail Garcia Burnette,
<v Speaker 3>the lead author, he was very clear about this in
<v Speaker 3>the paper. He said, the abundances they measured were far
<v Speaker 3>higher than predicted by current theoretical models.
<v Speaker 2>And when you say far higher, what kind of scale
<v Speaker 2>are we talking about? Is it like ten percent more
<v Speaker 2>than expected or double?
<v Speaker 3>We're talking orders of magnitude more. In some cases, it
<v Speaker 3>wasn't a small error. The standard models they use for
<v Speaker 3>these kinds of environments, they have act aryms like PDRs
<v Speaker 3>or xdrs.
<v Speaker 2>Okay, let's break those down.
<v Speaker 3>PDR that stands for photodissociation region. That's a model for
<v Speaker 3>a region where the chemistry is driven by intense ultraviolet
<v Speaker 3>light coming from young hot stars. It's the standard way
<v Speaker 3>we think molecules are built in a nebula at XDR
<v Speaker 3>X ray dominated region, that's a model for a region
<v Speaker 3>where the chemistry is driven by high energy x rays,
<v Speaker 3>usually coming from the accretion disk of the central black hole.
<v Speaker 2>So they took their JWST data, this huge inventory of molecules,
<v Speaker 2>and they plugged it into the PDR model and the
<v Speaker 2>XDR model, and the computer.
<v Speaker 3>Said the computer basically said error does not compute. The
<v Speaker 3>models predicted that the intense radiation in these regions should
<v Speaker 3>be destructive. It should shred complex molecules like benzene much
<v Speaker 3>much faster than they can form.
<v Speaker 2>So the models predict a chemical desert. But Jwst found
<v Speaker 2>a thriving jungle.
<v Speaker 3>A perfect analogy. And whenever you have a discrepancy that
<v Speaker 3>massive between observation and theory, it means your theory is
<v Speaker 3>missing a key in there is some engine driving this
<v Speaker 3>chemistry that isn't just UV lighter X rays, the continuous
<v Speaker 3>source hypothesis, that's it. And the real smoking gun for
<v Speaker 3>this was the methyl radicals, those fleeting chemical ghosts we talked.
<v Speaker 2>About right, Because they disappear so quickly, so fast.
<v Speaker 3>For us to be able to see so many of them,
<v Speaker 3>it means they have to be replenished constantly. There has
<v Speaker 3>to be a NonStop fountain of them.
<v Speaker 2>It's like seeing a jet of water suspended in mid air.
<v Speaker 2>You know without a doubt that there's a pump running somewhere.
<v Speaker 2>If the pump stop, the water would fall instantly. The
<v Speaker 2>radicals are the water in the air.
<v Speaker 3>That's a great way to think about it. So the
<v Speaker 3>billion dollar question for the team became what is the pump?
<v Speaker 3>What is the physical mechanism that can create this unbelievable
<v Speaker 3>abundance of complex hydrocarbons right in the jaws of a
<v Speaker 3>supermassive black hole and do it without destroying them instantly?
<v Speaker 2>And this is where the Oxford teams modeling really came
<v Speaker 2>into play. If they started running simulations trying to find
<v Speaker 2>the missing ingredient, they started by ruling things out.
<v Speaker 3>They did. First, they ruled out ten alone, just making
<v Speaker 3>the gas hot doesn't give you this specific mix of molecules.
<v Speaker 3>Then they ruled out simple turbulence, you know, shock waves
<v Speaker 3>from gas clouds smashing into each other. While that certainly
<v Speaker 3>happens in a place like this, the chemistry it produces
<v Speaker 3>doesn't match the specific fingerprint jwst saw.
<v Speaker 2>So they're crossing off all the usual suspects and they're
<v Speaker 2>left with one culprit. And it's a culprit that honestly
<v Speaker 2>sounds like it belongs in a nineteen fifties science fiction movie.
<v Speaker 3>Cosmic rayse I feel like.
<v Speaker 2>Cosmic rays is one of those terms that everybody has heard,
<v Speaker 2>but almost nobody really understands what it is. Is it
<v Speaker 2>a type of light like a gamma ray.
<v Speaker 3>That's a most common misconception. Array implies light a photon,
<v Speaker 3>But cosmic rays are not light. They are physical particles.
<v Speaker 3>They are matter, so atomic bulk, that's a much better
<v Speaker 3>way to describe them. Mostly, they're protons, the nucleus of
<v Speaker 3>a hydrogen atom, or sometimes the nuclei of heavier atoms,
<v Speaker 3>all of them accelerated to velocities approaching the speed of light.
<v Speaker 2>And in a galaxy like this, where are these bullets
<v Speaker 2>coming from?
<v Speaker 3>From the black hole itself? As matter spirals into the
<v Speaker 3>black hole as accretion disc the intense gravitational and magnetic
<v Speaker 3>fields act like a colossal particle accelerator. They grab particles
<v Speaker 3>and fling them outwards in jets and streams at incredible speeds.
<v Speaker 2>So the black hole is acting like a giant machine gun,
<v Speaker 2>just spraying the surrounding gas clouds with these high speed protons.
<v Speaker 3>Exactly, And this leads us directly to the new mechanism
<v Speaker 3>they propose in the paper. They call it top down chemistry,
<v Speaker 3>and this, for me, this is the most profound and
<v Speaker 3>exciting part of the entire study.
<v Speaker 2>Okay, top down contrast that with what we normally think of,
<v Speaker 2>which I guess would be bottom up chemistry.
<v Speaker 3>Yes, standard astrochemistry, the kind we see in cold dark
<v Speaker 3>clouds in our own galaxy is almost always bottom up.
<v Speaker 3>You start with one atom, say a carbon atom. It
<v Speaker 3>floats around until it bumps into a hydrogen atom. They
<v Speaker 3>skick together.
<v Speaker 2>Now you have ch and then that bumps into another hydrogen.
<v Speaker 3>Right now you have h. You are slowly, painstakingly building
<v Speaker 3>a lego house, one tiny brick at a time, over
<v Speaker 3>millions and millions of years.
<v Speaker 2>It's a slow, steady construction process, very slow.
<v Speaker 3>But top down chemistry is the complete opposite. In the
<v Speaker 3>nucleus of iras zero seven two five to one, you
<v Speaker 3>already have those big complex things we mentioned earlier, the
<v Speaker 3>soot grains, the carbonaceous dust of large molecules called PAH
<v Speaker 3>polycyclic aromatic hydrocarbons.
<v Speaker 2>So the lego wall is already built.
<v Speaker 3>The wall's pre built yet. And the cosmic rays they
<v Speaker 3>are the sledgehammer ah.
<v Speaker 2>I see exactly where this is going.
<v Speaker 3>A high speed cosmic ray particle of the proton that
<v Speaker 3>doesn't build anything and slams into one of those large
<v Speaker 3>dust grains are a big pH molecule, and the energy
<v Speaker 3>of that impact is so immense that it shatters the
<v Speaker 3>chemical bonds holding the large structure together.
<v Speaker 2>It's fragmentation.
<v Speaker 3>Its fragmentation. The big molecule or the dust grain breaks apart.
<v Speaker 3>And what are the little pieces that get chipped off?
<v Speaker 2>What is the debris benzene, methane, acetylene, the methyl.
<v Speaker 3>Radicals, the entire infant, the jungle of molecules that JWST found.
<v Speaker 3>It's not being carefully grown. It's the debris from a
<v Speaker 3>constant demolition.
<v Speaker 2>That completely flips the script. Our intuition says that high
<v Speaker 2>energy particles in radiation are the enemies of life. They
<v Speaker 2>sterilize things, they break down complex molecules. But you're saying
<v Speaker 2>that here the violence is the very thing creating the complexity.
<v Speaker 3>That is the core conclusion of the paper. These deeply
<v Speaker 3>obscured galactic nuclei are not just energy sources, they are factories.
<v Speaker 3>The black hole provides the power by accelerating the cosmic rays.
<v Speaker 3>The cosmic rays are the machinery, and the raw material
<v Speaker 3>is the abundant carbon dust.
<v Speaker 2>Did they have proof for this model or is it
<v Speaker 2>just a really elegant story that happens to fit the numbers.
<v Speaker 3>They found a direct correlation. They looked at other similar
<v Speaker 3>galaxies and they found a clear link between the cosmic
<v Speaker 3>ray ionization rate, which is basically a measure of how
<v Speaker 3>intense the cosmic ray bombardment is, and the abundance of
<v Speaker 3>these small hydrocarbon molecules.
<v Speaker 2>The more sledgehammers you have swinging, the more you produce.
<v Speaker 3>Exactly the lines on the graph matched up perfectly. It
<v Speaker 3>explains everything. It explains why the old UV and X
<v Speaker 3>ray models failed because this process has nothing to do
<v Speaker 3>with light. It explains the ridiculously high abundance, and it
<v Speaker 3>explains the constant presence of the radicals. They're being freshly
<v Speaker 3>broken off the large grains every second.
<v Speaker 2>So Iras zero seven two five to one is a
<v Speaker 2>cosmic refinery. It's taking this heavy crude material, the carbon dust,
<v Speaker 2>and it's cracking it into lighter, more refined, more useful
<v Speaker 2>organic molecules.
<v Speaker 3>Processing is exactly the right word.
<v Speaker 2>Which of course brings us to the big one, the
<v Speaker 2>question every single person listening is thinking right now, even
<v Speaker 2>if they know the answers probably know. We have water,
<v Speaker 2>we have carbon, we have energy, we have complex organics.
<v Speaker 2>Are we looking at a habitat for life?
<v Speaker 3>I knew this was coming, and I have to be
<v Speaker 3>the careful scientist here. The paper's co author, Professor Demitro
<v Speaker 3>Rigo Pulo. She specifically addressed this to you manage expectations.
<v Speaker 2>Let me guess the answer. It's not aliens.
<v Speaker 3>It's not aliens.
<v Speaker 2>No.
<v Speaker 3>She was very clear that while benzene and methane are
<v Speaker 3>organic molecules, they are not themselves life. You don't have
<v Speaker 3>a living cell that's made of pure benzene. You don't
<v Speaker 3>find DNA floating freely in a hot gas cloud.
<v Speaker 2>But I feel a butt coming.
<v Speaker 3>There is a very very big butt. She described these
<v Speaker 3>molecules as the products of prebiotic.
<v Speaker 2>Chemistry, prebiotic before life.
<v Speaker 3>The ingredients the starter kit to get to life as
<v Speaker 3>we know it. To get to DNA RNA proteins, you
<v Speaker 3>first need things like amino acid to nucleotides, and to
<v Speaker 3>build those you need a ready supply of simpler building
<v Speaker 3>blocks like methane and structures like carbon rings.
<v Speaker 2>You can't bake the cake without first having flour and
<v Speaker 2>sugar exactly.
<v Speaker 3>This galaxy isn't the bakery where the cake of life
<v Speaker 3>is being made, but it might be the flour mill
<v Speaker 3>churning out the essential ingredients on an industrial galactic scale.
<v Speaker 2>And this has to connect to the bigger picture of
<v Speaker 2>galactic evolution, right because this factory isn't a closed system.
<v Speaker 2>This material doesn't just stay there forever, not at all.
<v Speaker 3>Galaxies are dynamic. Supermassive black holes and intense star formation
<v Speaker 3>create powerful galactic winds, Supernova explode. All these processes push
<v Speaker 3>material out of the dalactic center.
<v Speaker 2>So these clouds, rich with all these freshly made organic molecules,
<v Speaker 2>they get blown out into the rest of the galaxy.
<v Speaker 3>They get ejected into the galactic disk, They drift for
<v Speaker 3>millions of years, they mix with other clouds, and eventually
<v Speaker 3>they might cool and condense to become the raw material
<v Speaker 3>for the next generation of stars and crucially planets.
<v Speaker 2>So you're saying that the carbon that makes up my body,
<v Speaker 2>the nitrogen in my DNA, some of it might have
<v Speaker 2>passed through a violent cosmic factory like this one billions
<v Speaker 2>of years ago.
<v Speaker 3>It's not just possible, it's looking increasingly likely. We used
<v Speaker 3>to think that the chemical complexity of the universe was
<v Speaker 3>built up very slowly in these quiet, cold corners. This
<v Speaker 3>study suggests that they're really heavy lifting the efficient processing
<v Speaker 3>of raw carbon dust into useful organic starter kits might
<v Speaker 3>happen in the most violent places in the cosmos.
<v Speaker 2>It makes the universe feel so much more efficient. Even
<v Speaker 2>the destroyers the black holes are playing a critical role
<v Speaker 2>in the cosmic construction supply chain.
<v Speaker 3>It points to a grand cycle. Dust is created in
<v Speaker 3>the ashes of dying stars, it gets funneled into the
<v Speaker 3>galactic core. The black hole's energy processes it into organic molecules.
<v Speaker 3>Those molecules are then spread back out across the galaxy
<v Speaker 3>to form new planets and just maybe provide the ingredients
<v Speaker 3>for biology.
<v Speaker 2>It's a galactic ecosystem.
<v Speaker 3>Let's talk about the future. Though this was just one
<v Speaker 3>galaxy program ID three three sixty eight. Is it possible
<v Speaker 3>this is just a one off, a weirdo galaxy or
<v Speaker 3>could this be happening everywhere?
<v Speaker 2>That is the next great question, and the most exciting
<v Speaker 2>part of this JWST is just getting started. The paper's
<v Speaker 2>conclusion is that this work opens up a completely new
<v Speaker 2>avenue of research. Now we know what to.
<v Speaker 3>Look for, We know what to look for that specific
<v Speaker 3>spectral fingerprint of hydrocarbons and radicals, and we know where
<v Speaker 3>to look in the hearts of these deeply obscured dusty galaxies.
<v Speaker 3>We can now start a systematic survey.
<v Speaker 2>We can point web at other U allergies. We can
<v Speaker 2>look at active galactic nuclei.
<v Speaker 3>We can check the cores of starburst galaxies. We can
<v Speaker 3>begin to map out just how common these organic factories are.
<v Speaker 3>And if it turns out that every major galaxy with
<v Speaker 3>a supermassive black hole is doing this.
<v Speaker 2>Then the universe is absolutely a wash in prebiotic chemicals.
<v Speaker 3>It changes the odds, doesn't it. If the ingredients for
<v Speaker 3>life are rare and hard to make, then life itself
<v Speaker 3>should be rare. But if the ingredients are an inevitable
<v Speaker 3>natural byproduct of black hole physics.
<v Speaker 2>Then they should be everywhere everywhere. I just want to
<v Speaker 2>circle back to the technology for a moment before we
<v Speaker 2>wrap this up. We mentioned that false color image they
<v Speaker 2>made with the different filters for different wavelengths. It sounds
<v Speaker 2>really technical, but what that represents is it's a paradigm
<v Speaker 2>shift and how we see things.
<v Speaker 3>It really is. Before we could take a photograph of
<v Speaker 3>the vault door. Now we're taking MRI scan of what's inside.
<v Speaker 3>We can slice it into layers. We can see exactly
<v Speaker 3>where the hot dust is versus where the cool gas
<v Speaker 3>is versus where the benzene is most abundant.
<v Speaker 2>And that's why we need to keep building and funding
<v Speaker 2>these incredible machines, because looking at this galaxy with Hubble
<v Speaker 2>was like staring at a locked treasure chest. Looking at
<v Speaker 2>it with web we found the gold inside and the goal.
<v Speaker 3>It turned out, was carbon, which for any potential life
<v Speaker 3>is infinitely more.
<v Speaker 2>Valuable to che So the real shift in our understanding
<v Speaker 2>is it's from seeing the universe as this static, physical
<v Speaker 2>place to seeing it as a dynamic chemical reactor.
<v Speaker 3>I think that's the perfect way to summarize the philosophical shift.
<v Speaker 3>The old view of space is that it's just vast
<v Speaker 3>empty distances with rocks and stars governed by physics, gravity inertia.
<v Speaker 3>But this new view, the dynamic reactor view, it sees
<v Speaker 3>the universe as a kitchen, a very chaotic kitchen, a messy,
<v Speaker 3>violent kitchen. Yes, things are being chopped up and boiled
<v Speaker 3>and mixed. It's not passive. It is actively evolving, not
<v Speaker 3>just physically but chemically.
<v Speaker 2>And we ultimately are a product of that cosmic cooking process.
<v Speaker 3>We are the souflet that, against all odds, managed to rise.
<v Speaker 2>I love that. Okay, So let's just do a quick
<v Speaker 2>recap of the incredible journey we've been on today.
<v Speaker 3>Let's dope.
<v Speaker 2>We started with a hidden treasure, the galaxy iras zero
<v Speaker 2>seven two five to one zero two four eight, completely
<v Speaker 2>invisible behind a colossal wall of dust.
<v Speaker 3>We use the infrared superpowers of the James webspased telescope
<v Speaker 3>to finally pierce that wall.
<v Speaker 2>And inside we didn't find what we expected. We found
<v Speaker 2>a chemical anomaly, a shocking abundance of complex organic molecules
<v Speaker 2>like benzene, methane, and especially the elusive methyl radical.
<v Speaker 3>An inventory that all of our current theoretical models said
<v Speaker 3>simply could not exist.
<v Speaker 2>There we realized that the slow, calm, bottom up construction
<v Speaker 2>models just didn't work. We needed a constant, powerful source
<v Speaker 2>for these molecules.
<v Speaker 3>And the culprit, the engine of the factory, turned out
<v Speaker 3>to be the central supermassive black hole itself, or rather
<v Speaker 3>the cosmic rays it fires out like sub atomic bullets.
<v Speaker 2>These cosmic rays act like sledgehammers, smashing into large carbon
<v Speaker 2>dust grains and shattering them into the prebiotic building blocks
<v Speaker 2>of life, a process of top down chemistry.
<v Speaker 3>And finally we realize that these cosmic factories might be
<v Speaker 3>the primary mechanism for seeding entire galaxies with the raw
<v Speaker 3>ingredients necessary for biology to begin.
<v Speaker 2>In absolutely staggering discovery, it really is. I want to
<v Speaker 2>leave our listeners with one final thought, something to sort of,
<v Speaker 2>you know, chew on the next time they look up
<v Speaker 2>at the night sky, go for it. We have this
<v Speaker 2>deep seated idea that life is fragile, that it needs
<v Speaker 2>a Goldilocks zone, not too hot, not too col it
<v Speaker 2>needs a calm, quiet pond, a safe space to get started.
<v Speaker 3>That's the standard narrative, absolutely, But.
<v Speaker 2>This study suggests that the ingredients for life are born
<v Speaker 2>in the complete opposite of a safe space. They are
<v Speaker 2>forged in the fire. They are the direct byproduct of
<v Speaker 2>the most violent, radioactive, high energy places in the entire cosmos,
<v Speaker 2>the immediate vicinity of super massive black holes.
<v Speaker 3>It's the ultimate paradox. The destroyer is also the creator exactly.
<v Speaker 2>So here's the thought. If organic chemistry is this abundant,
<v Speaker 2>this easy to make in the single most hostile environment,
<v Speaker 2>we can imagine what does that imply about the rest
<v Speaker 2>of the universe. Does it mean that the recipe for
<v Speaker 2>life isn't a secret, but that it's being broadcast across
<v Speaker 2>the cosmos constantly. That the universe isn't just passively waiting
<v Speaker 2>for life to happen, but is actively manufacturing the parts list,
<v Speaker 2>chipping it out everywhere, just waiting for a quiet little
<v Speaker 2>planet to catch the seeds.
<v Speaker 3>That is a beautiful and a deeply provocative thought. If
<v Speaker 3>the seeds are truly blowing in the cosmic wind, then
<v Speaker 3>the garden might be much much bigger and more widespread
<v Speaker 3>than we've ever dared to imagine.
<v Speaker 2>I think I'll be mulling that one over for a
<v Speaker 2>long time. It's not just light up there, It's a
<v Speaker 2>chemical factory, indeed, it is. Thanks for joining us for
<v Speaker 2>this as always, keep looking up and keep asking questions.
<v Speaker 2>We'll see you next time you are everyone, M. S. S.
<v Speaker 3>Sai L.