What the if we could go back to 1930 and experience the reluctant discovery of an entirely new kind of particle? When electrons started bouncing off things with missing momentum, physicist Wolfgang Pauli faced a choice: abandon the fundamental law of conservation of energy or invent something completely invisible to save physics. His solution was the neutrino - a particle so tiny and elusive it took 40 years to actually detect one, but so essential that billions are zipping through your body rig...
Jun 28, 2025•46 min
[Matt & Gaby are away this week, so please enjoy this Encore Presentation of one of our most popular episodes.] What The IF... you could see the TRUE SCALE of the Universe? We imagine entering the notorious torture device from he dastardly mind of the great Douglas Adams. Tune in to find out how it feels, and bring a BIG EGO and a hunger for fairy cake because this is a mind expanding adventure if you have a tiny, tiny, tiny, tiny, tiny HUMAN MIND. Don't Panic! ---- Got an IF of your own? Wa...
Jun 20, 2025•49 min
What if climate change made submarines completely undetectable? As ocean temperatures rise, thermal layers are disrupting sonar so dramatically that entire regions become acoustic dead zones where submarines can hide indefinitely. Watch civilization adapt when nuclear subs vanish into warm water pockets, jellyfish swarms clog warship engines, and whale songs get drowned out by thermal chaos. Welcome to a world where jellyfish defeat the entire nuclear navy without even trying. Based on "Submarin...
Jun 13, 2025•47 min
What if the universe was stuck in an eternal cosmic Groundhog Day? Picture traveling backwards through time past the Big Bang only to discover you've looped right back to where you started - like a cosmic snake eating its own tail. Explore the mind-bending possibility that our entire universe repeats itself in endless cycles, where infinite copies of you exist scattered across millions of light years, all having this exact same conversation at different stages of cosmic evolution. Join cosmologi...
Jun 09, 2025•49 min
What if teaching robots to play badminton was the beginning of the end? Scientists at ETH Zurich have successfully trained four-legged robots with mechanical arms to track shuttlecocks, navigate courts, and execute precise strikes against human players. But once these robots master the art of intercepting flying objects, what's next? Watch civilization unravel as badminton-playing robots evolve from harmless sporting partners to grenade-deflecting military units, eventually leading to wandering ...
May 30, 2025•48 min
We're off this week for the Memorial Day Holiday in the US so we present here one of our most popular episodes, a classic IF from August 13, 2021 with the incomparable marine biologist from Australia, Dr. Vanessa Pirotta. Take a deep breath and enjoy this deep dive! ---- WHALES spend their entire lives inside a medium, water, in which they can’t actually breathe. So throughout the day, and the night, they have to swim to the surface to take a breath of that sweet, sweet ocean air… or they die! W...
May 26, 2025•1 hr 2 min
What if gene editing treatments become commonplace? Explore a world where a single DNA letter gets fixed with just three little shots, transforming deadly genetic disorders into manageable conditions. Babies born unable to clear toxic ammonia from their bodies now thrive after a simple genetic correction. Future treatments could target everything from sickle cell anemia to cystic fibrosis with similar precision. Imagine celebrating your bar mitzvah with a shot that cures your ancestral lactose i...
May 16, 2025•48 min
What if you could build up a resistance to absolutely anything through repeated exposure? Inspired by the real-life story of Tim Friede, who injected himself with increasing doses of snake venom until he developed immunity, this episode explores a world where humans can become resistant to gravity, car crashes, or even anvils to the head. From specialized training centers at the mall that progressively drop heavier objects on your skull to high school gym classes where kids graduate from Barbie ...
May 09, 2025•51 min
What if humans and all mammals hatched from eggs? This episode explores a world where expectant parents carry decorated eggs to work, conference tables have special egg holders, and the Upper East Side boasts expensive hatcheries playing Mozart to developing offspring. From the marketing potential of personalized egg covers to the social stigmas of different egg-carrying methods, discover how our relationship with reproduction and parenting would transform. Would human eggs be leathery like rept...
May 02, 2025•53 min
Experience outer space without leaving Earth's atmosphere! Join planetary geologist and space lifestyle coach Kirby Runyon as he guides us through cosmic destinations on our own planet. From New Mexico's lava flows that mirror the Moon's dark volcanic plains to Northern Arizona's Meteor Crater (where three downtown Philadelphias could fit in the bottom), discover Earth's surprising cosmic connections. Float weightlessly in a modified Boeing 727 as it performs "parabolic arcs" giving you 20 secon...
Apr 26, 2025•28 min
Embark on a mind-bending thought experiment as our intrepid explorers dive deep into the annals of history, imagining how early humans might have unraveled the mysteries of solar eclipses. From cave paintings to mythical tales of celestial dragons, join the journey as Throg and his tribe attempt to make sense of the sun's sudden disappearance. Joins us as we ponder the birth of astronomy and the evolution of scientific thinking. --- Find out more about Gaby's science fiction short story! Here ar...
Apr 18, 2025•55 min
What if humans never stood upright and remained quadrupeds? Our world would transform into a society where everything is built low to the ground. Imagine shopping carts you push with your face, stadiums with no chairs where everyone sits like animals, and the social awkwardness of having your posterior constantly on display. The loss of our hands would dramatically impact agriculture, cooking, and sports—though we'd excel at truffle hunting and finding loose change. Discover why our spines might...
Apr 11, 2025•49 min
What if the fundamental forces of nature could change with time? Step into a universe where gravity might send you floating to the ceiling one morning, your coffee maker stops working as electricity changes its rules, and your very atoms could suddenly decide to explode. From your nervous system running on unpredictable electrical currents to the strong nuclear force taking a day off, discover how even tiny fluctuations in these cosmic constants would transform daily life into surreal chaos. Tur...
Apr 08, 2025•59 min
What if filmmakers took their cameras to space? Prepare for a world of zero-G cinematography! From weather-sealed cameras designed to handle unexpected astronaut vomit to the perpetual hum of life-support systems ruining your audio, documentary filmmaking in orbit presents unique challenges. Discover why the International Space Station's lighting is "just awful," how playing a guitar in microgravity sends you spinning in unexpected directions, and why the first task in every Mars simulation is f...
Apr 01, 2025•43 min
Note from Philip: Matt and Gaby are both on assignment this week, so we proudly present an encore of one of our most popular episodes ever. ——— We welcome our newest Patreon supporter, Martin from Frankfurt, Germany! Inspired by the Paris Olympics which open today, we imagine Olympic events spread across the solar system in the year 3024! High jumps on the Moon, luge races on asteroids, and synchronized swimming in Titan's methane lakes. Athletes train in centrifuges to prepare for different gra...
Mar 14, 2025•49 min
In a world where no creature ever evolved wings, island ecosystems would be barren wastelands, Darwin might never have filled his bathtub with broccoli, and wars might be less explosive due to the absence of bird guano for making gunpowder. Explore an Earth where dragonflies never buzzed, butterflies never fluttered, and humans might have focused exclusively on land speed instead of aerospace. From the philosophical implications of never seeing flight in action to the surprisingly massive ecolog...
Mar 06, 2025•41 min
We're sharing our bonus show this week that is usually available only to our Patreon supporters. This week's Beyond the IF continues our sobering discussion about the rapidly deteriorating state of science funding in America. The conversation took us deeper into the real-world impacts we're already seeing - from major universities canceling all graduate admissions to a student who landed a Park Service job only to have it eliminated before she could even start. These aren't hypothetical scenario...
Feb 24, 2025•20 min
The current US Administration's sudden gutting of science funding is creating an unprecedented crisis. Scientists are waking up to find themselves unemployed, as anonymous officials pull the plug on research programs with no warning or debate. This episode examines the immediate fallout as laboratory freezers shut down, irreplaceable samples are lost, and researchers scramble to preserve years of work. What comes next could be devastating - a potential mass exodus of scientific talent. If fundin...
Feb 24, 2025•55 min
Picture a world where meteor showers aren't just annual events - they're a constant barrage of cosmic debris raining down from above. From sonic booms that make sleep impossible to the challenges of titanium umbrella manufacturing, explore how humanity might cope with endless celestial bombardment. Discover why the moon's pockmarked surface could become Earth's new normal, why your local cathedral might be built from meteorite fragments, and how our atmosphere would transform into a perpetual bl...
Feb 16, 2025•55 min
Imagine a world where garbage grows faster than we can handle it. From towering mountains of trash transforming Central Park into a burn pit, to fashionable gas masks becoming the next big trend, to super-sized Pizza Rats dragging entire pies down subway stairs - Matt touches on what happens when our waste production spirals out of control. Discover the fascinating science behind Norway's garbage-to-energy programs, learn why your building's trash chute might be too small for modern waste, and f...
Feb 10, 2025•49 min
What if humans only needed to poop twice a year? Listener Randy Woods sent in this fascinating question that explores everything from subway systems suddenly smelling fresher to plumbers planning career changes in a world where human waste becomes a rare event. Dive into the fascinating science of gut microbiomes, learn why having "zero waste" might wreak havoc on Earth's ecosystems, and discover why some scientists think the total elimination of poop could cause an evolutionary crisis. Through ...
Feb 07, 2025•53 min
What if humans could only move eight inches in 24 hours? After watching mushroom corals take a full day to scoot that far, we explore life at an even slower pace than sloths. Trade sprinting after prey for the exciting new sport of not moving at all! Develop a metabolism so slow you'll make a sloth look hyperactive, grow some stylish moss camouflage, and discover why traveling one foot becomes the adventure of a lifetime. Turns out the slow life comes with some surprising survival strategies - j...
Feb 01, 2025•45 min
Here's our Bonus show, "Beyond The IF" which we record each week for our Patreon supporters. We're sharing it here so you can get a taste of what it's like. If you're not a Patreon supporter, you can learn more about the benefits available to all our wonderful members at patreon.com/whattheif. We continued the show by talking about the fascinating world of ants—their wars, their teamwork, and how they recognize each other using scent. These tiny creatures gave us plenty to think about. Gaby also...
Jan 20, 2025•19 min
What if we could harness the superior problem-solving abilities of ants? After scientists discovered that ants outperform humans at maneuvering objects through mazes (even when the humans can see but aren't allowed to talk or gesture), we imagine a world where humans learn to control these master cooperators. From ant armies forming living conveyor belts to deliver mail, to using chemical trails to guide them in cleaning houses, explore what happens when humans try to domesticate insects for man...
Jan 20, 2025•56 min
What if toxic chemicals weren't toxic anymore? Take a magical tour through a world where mercury becomes the ultimate playground material for ice skating, lead paint makes a dazzling comeback in interior design, and DDT returns as humanity's mosquito-fighting champion. Inspired by Larry Woods' whimsical question, this episode dives into the surprising history of mercury in hat-making (spoiler: this explains why the Mad Hatter was actually mad), Newton's ill-advised alchemical adventures with tox...
Jan 13, 2025•48 min
Your houseplants might be screaming right now, but you'd never know it (unless you're a moth). Scientists discovered that stressed and dehydrated plants emit ultrasonic clicks that moths can hear and use to choose where to lay their eggs - like tiny vegetative Yelp reviews. But what if humans could also tune into this botanical broadcasting network? From coffee shops filled with complaining houseplants to ultrasonic opera singers hitting notes that would make dogs cover their ears, explore a wor...
Jan 05, 2025•1 hr
What happens after humans? According to fascinating research from Oxford University, octopi might be perfectly positioned to become Earth's next civilization builders. These eight-armed innovators could evolve over millions of years into six-foot-tall underwater architects, developing amazing technologies like saltwater-hardened concrete and creating Venice-style coastal cities. Picture a future where octopi run underwater factories and construct amphibious settlements along what used to be Miam...
Dec 29, 2024•47 min
Ever wonder what would happen if life got flipped in a molecular mirror? In this episode, we explore the fascinating possibility of creating mirror-image life forms. Picture bacteria with every molecule backwards - like they've been pulled through the looking glass! Our immune systems would be totally confused, like trying to read a book reflected in a spoon. These backwards bugs would need their own special backwards food, and might create their own unique mirror-world ecosystem alongside our r...
Dec 14, 2024•52 min
Google's DeepMind has shattered a long-standing barrier in weather forecasting, achieving reliable 15-day predictions that were previously thought impossible due to chaos theory. Traditional fortune tellers are nervously updating their résumés as AI tackles the age-old question: if we can predict the weather two weeks out, what else can we predict? From knowing which baseball team will win before the first pitch to figuring out if you'll actually remember your briefcase tomorrow morning, explore...
Dec 08, 2024•50 min
What the if coffee was 11 times more powerful? Explore a world where cities install coffee pipeline infrastructure, coffee fountains replace water fountains, and everyone runs instead of walks. Watch society transform as coffee cartels become global powers, precision work becomes impossible, and sports games turn into high-speed chaos. From thimble-sized coffee portions to the rise of basement caffeine synthesizers, discover how civilization adapts when every cup of coffee packs the punch of ele...
Dec 02, 2024•54 min
