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Join mathematician Professor Hannah Fry and science creator Michael Stevens (Vsauce) as they dig into the weird scientific questions that often go unexplored.
Welcome to The Rest Is Science, a show that sits in the fascinating space between what we think we know, and what we actually know. Why do we assume we understand things like time, randomness, or even gravity? Once you start questioning these familiar ideas, reality becomes astonishingly strange and completely fragile.
Whether you're a lifelong science fan or just naturally curious, The Rest Is Science will change your perception of reality, and prove that the biggest questions are always the most fun.
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What Are These Unsettling Sounds?
Some of the most creepy sounds ever recorded aren't from horror films. They're real. From mysterious noises from the deepest parts of the ocean to the eerie voices of people who died more than a century ago, the world is full of sounds stra
Earth’s Tilt Makes Time Slippery
A sundial can be almost 16 minutes fast in November and 14 minutes slow in February, yet there's nothing wrong with it. So why does the Sun, our oldest timekeeper, disagree with the clock on your wrist? In this episode, Professor Hannah Fry
What Happened When We Stopped Squatting?
In many parts of the world, people rest in a deep squat every day. In others, most adults can barely get down there. So what’s going on? Hannah Fry and Michael Stevens dig into the history of squatting and why the ability to squat differs s
Mathematicians Are The Canary Down The AI Coal Mine
OpenAI claims a swarm of AI agents has solved the Navier-Stokes problem, one of the hardest unsolved questions in mathematics, with a $1 million prize attached. Then it released more than 700 more mathematical manuscripts, including claims
The Right Way To Open A Shaken Soda Can
A can of fizzy drink has been violently shaken. The pressure is building, the bubbles are ready to erupt, and Michael Stevens is about to open it. But Hannah Fry has a trick up her sleeve. Can a few taps really prevent an explosion? This we
Something Weird Is Going On With Placebos
For the past few decades, something strange has been happening in clinical trials. Painkillers aren't getting worse, but the placebos they're tested against appear to be getting better. In one landmark study, the advantage of pain medicatio
What Was A Mammoth Doing At The Bottom Of The Sea?
Hannah surprises Michael with a mammoth bone from Doggerland, the lost Ice Age land that once joined Britain to mainland Europe, and now lies beneath the North Sea. Who lived there, what roamed it, and how did an entire landscape disappear
Why Do We Turn on Innocent People?
Why do we turn on innocent people? A convincing story, a suspicious glance and suddenly everyone’s an armchair detective. But what happens when the crowd gets it completely wrong? Hannah Fry and Michael Stevens explore the psychology of fal
Hacking The Kendama With Physics
Michael hands Hannah a kendama, the Japanese cup-and-ball toy, and asks her to land a single catch. Then he brings out one built for him by Adam Savage of MythBusters and explains why a heavier kendama is a completely different physics prob
Why Do We Like Staring Into Fire?
What is fire, and why does watching it hold our attention in a different way from scrolling on your phone? Hannah Fry and Michael Stevens start with the science of a flame: why it glows, what its different colours reveal, and why fire is a
The Fluid Dynamics of Fountain Pens
The wait is finally over: Hannah Fry introduces Michael Stevens to her beloved fountain pen collection and the beautiful physics behind how fountain pens work. From a £20 Lamy Safari to vintage Waterman and Montblanc pens, Hannah explains h
Dying In Space, Trapped Water, and What's Hidden In Pi?
Almost every human who has ever lived has one thing in common: they were born and died on Earth. Except for three people. Hannah Fry and Michael Stevens uncover the extraordinary story of Soyuz 11, the Soviet cosmonauts who became the only
How Codes Were Used To Hack The Telegram Business
What if a single strange word could save you a fortune? In this episode Michael opens up a Victorian telegram code book and explores how users compressed long messages into brief coded words to outwit the per word charge of the telegraph sy
Why Your Body Needs Gravity
Does space travel make astronauts younger? Professor Hannah Fry and Michael Stevens explore Einstein’s twin paradox, time dilation and NASA’s famous Twins Study with astronauts Scott and Mark Kelly. After Scott Kelly spent 340 days aboard t
What Is Collagen All About?
Do collagen pills live up to their promises for skin and joints and healthy ageing? In this episode, Hannah and Michael examine what collagen actually is and how the body makes and uses it, before looking closely at whether collagen supplem
The Threshold of Human Sensation
What is the smallest thing you can possibly feel? Michael Stevens and Professor Hannah Fry journey through varying levels of perception, from the faintest touch on skin to the faintest trace of flavour and odour, and on to the remarkab
The Scale of the Universe
The scale of the universe stretches from the Planck length, the smallest scale physics can describe, to the observable universe, the largest thing we can see. Travel inward from one and outward from the other by powers of ten and they meet
Why Loud Chewing Makes You Angry
The mukbang phenomenon is comfort viewing for millions, yet for others the sound of chewing, slurping and everyday mouth noises is enough to trigger instant anger, disgust and distress. Why do the sounds soothe one person and enrage another
How Does Language Change What You Smell?
In this episode of Field Notes, Professor Hannah Fry and Michael Stevens (Vsauce) begin with a Persian word for a smell Hannah cannot detect on a freshly washed plate. From the Sapir-Whorf hypothesis and Russian words for blue to emotions a
Space Elevators, Skyhooks, and Space Fountains
What is the fastest, cheapest and possibly worst way to get into space? Could a nuclear explosion launch a manhole cover beyond the Earth’s atmosphere? And could space elevators, skyhooks or launch loops one day replace rockets? In this epi
Bizarre Watches and How They Work
Michael Stevens keeps a small museum of unusual timepieces on his desk: a clock that runs backwards, a watch built to be read in complete darkness, and one whose entire face simply says "now." Each is a miniature experiment in the psycholog
Why Your Brain Thinks You're Full (Even When You're Not)
How did the Gila monster, a desert lizard that eats just five times a year, help unlock the science behind Ozempic, Wegovy and Mounjaro? In this episode of The Rest Is Science, Professor Hannah Fry and Michael Stevens (Vsauce) trace the str
The Lake At The North Pole That Stops Europe From Freezing
When you picture the North Pole, you probably imagine a vast, frozen expanse of floating sea ice. But hidden deep beneath the surface of the Arctic lies something incredible: a massive, churning reservoir of nearly freshwater, suspended rig
The Science of Putting Sunglasses on The Sun
Why does the cartoon Sun always wear sunglasses? And how big would a real pair need to be? Hannah Fry and Michael Stevens investigate space mirrors, Reflect Orbital and solar eclipses to find out. Starting with a pencil held at arm’s length
Why Is It A Colour Wheel & Not A Line?
Colour wheel or colour line? Light itself runs in a straight line from red to violet, yet every colour theory chart bends that spectrum into a circle and the reason has nothing to do with physics. Professor Hannah Fry and Michael Stevens (V
Why Lithium Batteries SUCK
Can Hannah convince Michael that the lithium-ion battery is one of our most overrated inventions to ever happen? Hannah makes her case using a surprising energy source hidden in your fridge, a bell in Oxford that's been ringing since 1840,
What Happens Inside Earth's Forbidden Zones?
What grows in the spaces humans are forced to abandon? Hannah brings Michael an actual piece of barbed wire from the Korean Demilitarised Zone, one of the most heavily fortified and forbidden borders on Earth, and it sends them somewhere un
The 2012 Maya Apocalypse Myth & Confirmation Bias
Did the world really end in 2012? Not with fire, meteors or an ancient Mayan prophecy, but Professor Hannah Fry and Michael Stevens ask whether something just as profound took place instead. Together they unravel how one of the biggest myth
The Evolution of Colour Vision & Tetrachromacy
Can you hide your skeleton from a dog? Would you want to know the day you’ll die? Has evolution ever come close to producing a real fire breather? Michael and Hannah test a T-shirt with a secret only humans can see, leading them into the st
The Hole In Your Brain That Makes You Doomscroll
Why can't you leave a sealed envelope unopened? Professor Hannah Fry begins by refusing to allow Michael Stevens to open a mystery envelope addressed to him. A small act of torture that turns out to be the perfect way in to today's subject:
