What The If?

What the if the muses were real? Astrophysicist and folklorist Moiya McTier, author of "Mothers of Invention," takes us into a world where nine Greek goddesses are still on the job, and one of them might be on your doorstep this morning. Brain scans of jazz musicians mid-improvisation, the strange history of the word genius, and why the ancients may have been right that your best ideas aren't entirely yours. Come find out which muse has your back. —— When she's not studying zombie fungus at Harvard or helping us break the universe every week, our very own Gaby Paniccia writes scie...

What the if scientists were as famous as football stars? Picture packed bars, roaring crowds, and a physicist on the big screen getting absolutely destroyed by a rival's data. Come find out who wins. Inspired by "What People Get Wrong About Scientists" by Dava Sobel, Scientific American, June 16, 2026. —— When she's not studying zombie fungus at Harvard or helping us break the universe every week, our very own Gaby Paniccia writes science fiction. Her short story "The Automatic Grocery Store" is now featured on the popular podcast Escape Pod! Listen here: https://escapepod.org/2026/02/19/escape-pod-1033-the-automatic-grocery-store/ —— Check out our membership rewards! Visit us...

The whole crew is off on separate adventures this week, so we've unlocked the vault for an encore of one of our most popular episodes ever. Get ready to meet a galaxy ready to tell its own life story…. —— Our special guest this week is Dr. Moiya McTier, “Folklorist to the stars & Astrophysicist to the folks.” Dr. McTier is the host of the popular science podcast Exolore, and the author of the new book, The Milky Way: An Autobiography of Our Galaxy. She writes on her website: "I truly am my ancestors' wildest dream. I grew up in a log cabin in t...

What the if one gooey substance could drink up every kind of energy around it, from sunlight and heat to a stray spark or even the smack of a moving hand, and then hand it all back the instant you wanted it? Picture a world where that Goop is as cheap and common as tap water, quietly rewiring how everything gets powered, protected, and paid for. This one starts with a real, very early lab curiosity and runs it straight off a cliff, with a detour through some 150-year-old physics and a quick tangent into how your own cells pull...

What the if birds aren't actually birds? Play it straight for a second: somewhere between 1959 and 1971, the government quietly swaps every bird for a surveillance drone, and the cover-up runs deeper than a single federal agency. Chasing the premise turns up some genuinely real science — Cold War spy satellites that parachuted film canisters down from space to be caught midair by pilots, phased-array antennas that stitch many small dishes into one giant eye, and the actual military project to train pigeons to pilot missiles. Chase a ridiculous question far enough and you land somewhere inspiring: face to face with how in...

ANTIMATTER On Demand! by Philip Shane, Matt Stanley, Gabrielle Paniccia

Behind every voice you've come to love on this show is a life full of stories you've never heard. With our eighth anniversary just around the corner, we're doing something we've never done: each of us takes a turn in the guest's chair to answer all the questions the rest of us have always wondered about. First up is Gaby, a microbiologist at Harvard. What's it really like to spend your days in her world? Step into a lab alive with invisible wonders, head out to a beach where secret animal rituals are hiding in plain sight, and meet the...

Listener Kevin Towers asks: what the if the internet made everyone use their real, traceable name? No usernames. No masks. No hiding behind a clever handle at 2am. In this universe, every comment you fire off comes permanently stapled to your actual identity, your job, and your reputation. Would all that sunlight finally make us kind? Or would we go quiet, too nervous to ever post again? There's a crash course in why we turn feral online, a trip back to the dial-up Stone Age, and a rowdy brawl over whether forced honesty saves us or sinks us. So log...

What the if Lamarck was right? Stanford historian Jessica Riskin, author of "The Power of Life," is our guide into a universe where living things aren't passive passengers waiting for evolution to happen to them, but the active architects of their own bodies, their offspring, and the world around them. The line between creature and environment dissolves. Even the smallest beings turn out to be busy reshaping the planet. Stretch your neck. Reshape your descendants. Welcome to the Lamarckian universe. Want more Jessica? Grab her book at https://www.penguinrandomhouse.com/books/763654/the-power-of-life-by-jessica-riskin/ Find her at Stanford here: https://history...

What the if you were born on the Moon and Earth was the alien planet? Picking up from last month's cliffhanger, our travelers from the lunar surface finally touch down — and nothing about this place is what they expected. There's some physics, some biology, a detour through ancient Greece, and a first encounter with the locals that nobody could have prepared for. The view from another world makes home look stranger than it has any right to. Settle in for the second half of a two-part thought experiment about what it's like to visit the planet everyone else calls home. —— When s...

Listener Helina asks: what the if we just pumped the last drop of gasoline? The answer goes well beyond empty parking lots and quiet highways. Along the way there's some chemistry, some geology, a detour through ancient history, and a look at how a single resource quietly weaves through agriculture, manufacturing, transportation, and the food on your plate. Join us for this super fun thought experiment with some genuinely surprising science along the way. —— When she's not studying zombie fungus at Harvard or helping us break the universe every week, our very own Gaby Paniccia writes science fiction. Her short stor...

What the if you had to invent the alphabet from scratch? The Pharaoh hands you a stone tablet, a chisel, and an impossible assignment: condense every sound a human mouth can make into a handful of squiggles. Where do you even start? How do you decide what makes the cut? And once you do, how do you convince anyone else to use the thing? Linguist Danny Bate, author of "Why Q Needs U", takes us into the chaotic, contingent workshop of the ancient world's most consequential project, and the strange, very human accidents that shaped the 26 symbols you're reading right...

Picture this: you're a moon baby, born and raised underground on Luna, and you've just landed on Earth for the very first time. Meet the loonies, a civilization of moon-born humans who cook up rocket fuel from lunar ice and travel between worlds in spacecraft that might just include a pickleball court. Along the way we dig into the real science of rocket propulsion, tidal locking, G-forces on the human body, and why atmospheric reentry is the single hardest part of coming home. Where will the first crewed mission choose to touch down, and what will they make of a...

What the if microbes held a grudge? We're thrilled to welcome Ethan Rappaport, theoretical ecologist at the University of Maryland, to take us inside the tiny turf wars happening in your gut. We imagine bacteria sharing grudges like social media reposts, passing weaponized DNA to their neighbors through tiny genetic pamphlets called plasmids. Before you know it, whole microbial nations could be declaring war on your intestinal lining until you hand over the cotton candy. So maybe skip the diet and keep those gut buddies happy! —— When she's not studying zombie fungus at Harvard or helping us break the universe ever...

In honor of the 25th anniversary of the MIR SPACE STATION's spectacular farewell reentry, we're featuring an encore of our August 11, 2023 episode about what happens when SPACE JUNK takes over the sky! --- Hey there, fellow Iffers! It's Philip here, and do I have a treat for you. Dive into our latest episode, "Space JUNK!", an electrifying rollercoaster of discoveries and discussions that might just be a tad messier than usual. But as Matt rightly asks, how different is that from our regular antics, right? Well, this episode is special. Not just because we dive deep into the vast expanse...

What the if you could read minds — but only when someone's nearby? Congratulations, your subway commute just became a psychic nightmare. Babies would blast unfiltered emotional chaos straight into your skull, your dog would telepathically loop images of a full food bowl at you around the clock, and predators might evolve to psychically lure prey into their mouths. But here's the thing — telepathy might also unlock a kind of empathy we've never experienced before, letting us truly feel the world through someone else's mind. Tinfoil hats optional — tune in and find out why you might actually want one! Want to explor...

Right now, billions of particles are popping in and out of existence in your pocket. That's not a metaphor — that's quantum mechanics. Inspired by a YouTube video from Anton Petrov about virtual particles turning into real matter, this week's thought experiment asks: what the if virtual particles were the size of badgers? What happens when those badgers start spontaneously appearing at faculty meetings and first dates? Turns out empty space is a lot busier than it looks! Check out Anton Petrov's video that inspired this episode, "Actual Evidence of Virtual Particle Turning Into Real Matter!": https://youtu.be/VXdbffgTMVs?si=uL...

What the if you got zapped by a shrink ray while walking past the physics department and your only hope of survival was convincing a colony of ants to take you in? Lycaenid butterfly caterpillars have been pulling this con for millions of years, hacking ant colonies with fake chemical IDs and rhythmic vibrational passwords to sneak past the bouncers. Once inside, some get the royal treatment in ant kindergarten while others take a much darker approach to fitting in that you really need to hear to believe. Based on "The Password That Lets Caterpillars Hide in an Ant's Lair"...

What the if humans moved in schools — not classrooms, but like fish? Inspired by Carl Zimmer's New York Times article on how misinformation spreads among schooling fish, this episode explores a world where you can't go anywhere without your tightly synchronized pod. From navigating modern city life to figuring out what spooks a school of humans in the first place, things get weird fast. And the real science behind why fish school — and what happens when one of them panics for no reason — might just change how you think about your own posse. Based on "For Real, A Natural History of Mis...

MIT physicist David Kaiser is one of those rare scientists who can make mind-bending physics feel like a great conversation over coffee — funny, generous, and genuinely thrilled by what we still don't know. And what he's working on is wild. What the if the universe is packed with invisible black holes smaller than an atom? Dave thinks the mysterious "missing stuff" that holds galaxies together might not be some exotic undiscovered particle — it could be tiny black holes that formed a split second after the Big Bang. If he's right, a handful of them could be cruising through our solar syst...

A conspiracy theory went viral claiming that on August 12th, 2026, Earth will lose gravity for seven seconds. The internet did what the internet does, and millions of people started talking about it. So we decided to take the question seriously — what the if gravity actually clocked out for seven seconds? Let's just say you might want to start shopping for bungee cords now. And maybe a bouncy castle. This episode was inspired by an Instagram post from the now-mysteriously-vanished user Mr. Donya OF, where all great science begins. --- Find out more about Gaby's science fiction short story! Here are th...

What the if a groundhog could actually predict the weather? Turns out Punxsutawney Phil would need way more than a shadow — we're talking a full groundhog space program, weather satellites, underground supercomputers, and a solar shade the size of western Pennsylvania. Welcome to the groundhog deep state, where fuzzy bureaucrats run atmospheric circulation models and control whether the sun shines on command. And here's the kicker — the whole setup might actually teach you why the weather forecast on your phone is one of civilization's most underappreciated miracles. --- Check out our membership rewards! Visit us at Patreon.com/Whattheif Got an I...

We first shared this one on Super Bowl Sunday 2019 — what better weekend to bring back nature's ultimate underdog? Enjoy this encore presentation! ---- The HAGFISH, little known, little respected... greatly feared... by sharks! Is the hagfish the Spiderman of the Sea? This little slimy fish can spit out a slimy blob that BLOWS UP REAL BIG. What the if... WE could defend ourselves like that? Imagine the sport! In celebration of the SUPER BOWL, we present a special episode: The SLIME BOWL. Let the games begin! Don't miss an IF! Subscribe: linktr.ee/whattheifshow Share your love of the IF! Dr...

Planetary geologist Kirby Runyon from the Planetary Science Institute needs volunteers to map ancient impact melt flows on the moon from their home computers. What the if this went mainstream? Imagine science bars replacing sports bars, Twitch streams of competitive boulder counting, and reality TV dating shows where the best crater mapper wins. We explore a world where professional citizen scientists have mouse sponsorships and your doom-scrolling feed is full of discoveries instead of drama. Plus: the science of molten rock waterfalls and mountains that grew in minutes. Ready to become a citizen scientist? Here's how to get started: Join...

We're taking a break this week while Philip recovers from the 'double-whammy' of flu and COVID boosters. (Science works, but sometimes it makes you nap!) However, we couldn't let January 7th pass unnoticed. On this day in 1610, Galileo first spotted Jupiter's moon, Io. To celebrate, we’ve unlocked the vault for an encore of one of our most popular episodes ever. Strap in for a tour of a lava-covered world with Robin Andrews in... "Walking on IO". ---- DR. ROBIN GEORGE ANDREWS, science writer for The NY Times, National Geographic, Scientific American, and many more, joins us with an IF th...

What the if your New Year's resolution became a biological compulsion you literally could not ignore? Imagine waking up on January 1st with the same unstoppable urge that drives salmon to swim upstream, except instead of spawning, you absolutely must get to the gym three times a week. In this world, the darkness of winter triggers something deep in our ancient brain, locking us into whatever commitment we scribbled down at midnight. You'd have to rules-lawyer your own resolutions like a contract with a malicious genie. Society would develop rituals around helping eight-year-olds avoid accidentally resolving to rule the world...

What the if time suddenly started running backwards? Your breakfast un-eats itself, LEGO sets come pre-assembled, and you get younger every day. The dead have unfunerals, your room cleans itself, and teenagers slowly regress through middle school—backwards. Professor Ian Durham of Saint Anselm College stops by to explain the real physics behind time reversal and why photons might start shooting out of your eyeballs. Want to see time reversal in action? Check out The Palindrome Paradox, the mind-bending short film Ian recommends: https://youtu.be/hUcXGv-NzFQ?si=X086RFpXEj0ZNJmX Explore more physics at the Foundational Questions Institute—Ian's top...

Listener Anne of Queens got us thinking about flying reindeer for the holidays. Imagine herds of 1,500-pound mammals migrating through your town like Canada geese. Suddenly those goose droppings don't seem so bad. Discover why the classic Santa sleigh makes no aerodynamic sense (eight reindeer in parallel? Your cargo's dragging on the ground) and why the real solution is a reindeer dirigible with forty hovering reindeer and a sleigh dangling underneath. Watch Santa relocate from the North Pole to a Sri Lankan mountaintop, where his reindeer have evolved big fennec-fox ears to vent heat in the tropics. Strap on your...

What the if the Sun suddenly turned green? Your pizza now looks like charcoal because all red things go black. Stop signs become invisible. The sky shifts from cheerful blue to permanent dusk. And plants? They absolutely despise green light—they reflect it because green photons are the M&Ms they pick out of the bowl. So with a green Sun, photosynthesis grinds to a halt, oxygen tanks, and everything that breathes is in serious trouble. The only potential survivors might be weird microbes at deep ocean vents who never cared about sunlight anyway. On the bright side, colorblind people mi...

Happy Thanksgiving! We're off this week for the holiday, so we're presenting an encore presentation of an episode that was originally broadcast on September 5, 2018, and remains one of our all-time audience favorites. What the if humans evolved into shrikes - those adorable songbirds that impale their prey on thorns and barbed wire? Dr. Kiki Sanford, neurobiologist and host of This Week in Science, transforms us into gray-and-white birds with natural domino masks, hollow bones, and respiratory systems so efficient they make mammalian lungs look pathetic. Discover why you're literally dinosaur spawn, how shrikes turn thorns into gruesome pantries, and why...

Scientists just discovered ant queens that give birth to two completely different species - not twins, but actual separate species hatching from the same mother. But what the if every animal on Earth reproduced this way? Suddenly every pregnancy becomes a species reveal party, dairy farms need to manage herds where some cows give birth to regular calves while others pop out Ice Age yaks, and your family reunions include relatives from entirely different species sitting around the same table. Pet stores become absolute chaos when golden retrievers randomly give birth to wolves, and nobody knows which species they're getting...

This week we're trading hypothetical fungi and exploding planets for something scarier: actual government budgets. But don't worry - watching America accidentally hand the space race to China is just as entertaining as any sci-fi disaster scenario, and way more preventable. Think "For All Mankind" but with spreadsheets instead of heroic astronauts. What happens when NASA's budget gets slashed in half while China's space program keeps climbing? Chris Carberry from Explore Mars joins to explore a future where the International Space Station becomes the Chinese Space Station, lunar bases fly red flags instead of stars and stripes, and American astronauts...

What the if mosquitoes were helpless against the sweet smell of their own doom? Scientists genetically engineered Metarhizium fungus to smell so irresistibly delicious that mosquitoes can't help but fly straight into deadly traps with a 90-100% success rate. Discover why these bloodsuckers are actually tiny recycling agents in nature (who knew?), learn why we can't just eliminate them without the whole ecosystem throwing a tantrum, and find out why one will inevitably end up on a future space station driving the crew absolutely bonkers. From glowing green fungus-covered mosquitoes that look like tiny Marvel villains to biological pest control...

What the if Frankenstein was real and doctors actually tried stitching corpses together to create new people? Forget dramatic lightning strikes and brooding in Gothic towers - the real adventure is managing the world's most complicated pharmacy order when seventeen different immune systems meet for the first time and immediately start fighting. Join us as we explore why creating a functional monster requires less "It's alive!" moments and more "Does this insurance plan cover interdimensional tissue rejection?", discover the eternal question of whose blood type gets to be in charge, and meet today's synthetic biology scientists who figured out you...

What the if all bodies of water on Earth were fizzy like soda? In the real world, Seneca Lake in New York produces mysterious underwater booms called "Seneca guns" that scientists think come from occasional gas pockets, but nobody knows for sure. But in our imaginary world where every lake constantly fizzes like champagne, Chicago would relocate to the mountains as Lake Michigan burps methane clouds all day long. New York and London would move to higher ground, while only brave "soda dwellers" would live at water level like Mad Max characters in vans by the river. Niagara Falls would...

Honey guide birds in Africa respond to culturally distinct human calls and lead hunters to beehives, where humans crack them open and birds feast on the exposed beeswax. But what the if humans could whistle for any wild animal to help with tasks? Call a deer to haul your Costco groceries home (extra cabbage as payment), summon crows to find your lost earring for peanuts, or live in a Viking village where bears help with the salmon harvest then hibernate in someone's hut all winter. From turkey truffle-hunting to dolphins demanding space station aquariums, explore a world where wild animals...

Scientists just used artificial intelligence to design the world's first AI-generated viruses capable of hunting down and killing drug-resistant strains of E. coli. These bacteriophages look like tiny alien pineapples with syringes that stab bacterial cells, and they're just the beginning of AI-created life. From Matt's dream of dish-cleaning bacteria that won't eat you (hopefully) to the accidental discovery that trying to make super purple petunias actually created white flowers instead, this episode explores what the if happens when computers start writing genetic code. Discover why we're running out of antibiotics, how a virus with only 11 genes works, and why...

What the if your brain literally ran out of storage space like a laptop refusing to save one more file? Neuroscientist Nikolay Kukushkin explains how memory isn't a filing cabinet but more like water carving rivers down a mountain - and when you carve too many paths, everything becomes a muddy mess. Discover why Mr. S, who remembered everything perfectly, couldn't recognize faces or taste food because his brain was too full of details. Learn why sleep is your brain's nightly cleanup crew and why we're all currently running at 98% memory capacity thanks to information overload. Plus, find out why...

What the if gravitational waves were big enough to see and feel? Instead of measuring distortions smaller than a proton, imagine watching your coffee table accordion in and out as ripples from distant black hole collisions pass through your local cafe. Every time Charlie the cat bats a toy mouse in Greenwich Village, sugar cubes scrunch in Williamsburg cafes. Brain surgeons would need to ask all of New York to sit perfectly still during operations to avoid gravitational interference. Even parking lots would seem impossibly far away one moment and right next to you the next as space itself stretches...

What the if you found a rock on Mars that might - emphasis on might - show signs of ancient life? NASA's Perseverance rover discovered intriguing leopard spots in a 3.5-billion-year-old rock that contain vivianite, a mineral that could potentially indicate biological activity, though scientists remain cautiously skeptical. These dark-outlined splotches bear some resemblance to patterns that microbes can leave behind, but resemblance isn't proof. Join our trio as they explore the painstaking scientific process of investigating possible signs of life from tens of millions of miles away using lasers, spectroscopes, and instruments cleverly named Sherlock and Watson. From "poppy...