The Rest Is Science
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.
Episodes
October 21, 2026 • 37 mins
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 so much between cultures.Plus, your questions: What happens to the air pressure inside a car when it goes round a bend? Why do some burps come out higher than others? And why do tautologies ...
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October 18, 2026 • 67 mins
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 touching the Riemann hypothesis, faster than anyone can check them. Mathematicians are not happy, and the reason goes far beyond the money.
In this episode of The Rest of Science, mathematician ...
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October 14, 2026 • 38 mins
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 week on The Rest Is Science, Hannah and Michael begin with the surprisingly complicated physics of carbonation before tackling a much bigger question: can we really trust science?From the replicatio...
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October 11, 2026 • 49 mins
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 medication over placebo shrank from 27.3% in 1996 to just 8.9% in 2013.
Even stranger? This trend was found almost entirely in American trials.In this episode of The Rest Is Science, Professor Hannah ...
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October 7, 2026 • 42 mins
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 under the waves?Then it's your questions: where did "cool" come from as a word for style, and how did it stick around for so long? What on earth is "skank face"? And what are Hannah and Michael r...
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October 4, 2026 • 51 mins
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 false accusations, witch hunts and mob mentality, starting with Richard Jewell, the security guard hailed as a hero after the 1996 Atlanta Olympics bombing before becoming the target of a m...
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September 30, 2026 • 40 mins
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 problem.
A kendama looks like a children's toy. It is really a pendulum, a lesson in angular momentum and a catching problem borrowed from spacecraft docking. Michael and Hannah get into why the s...
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September 27, 2026 • 59 mins
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 series of chemical reactions rather than a single substance.
Then they travel back to a time before wildfires could burn on Earth, and ask how early humans learned to use and make it.
C...
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September 23, 2026 • 65 mins
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 how capillary action, surface tension, air pressure and carefully engineered feeds control the flow of fountain pen ink. Michael tests the collection, chooses his favourite and discovers why the ...
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September 20, 2026 • 49 mins
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 humans ever to die in outer space, and what their deaths meant for the future of human spaceflight.But that raises a bigger question: what exactly is trapped on Earth, and what can escape?
Is t...
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September 16, 2026 • 56 mins
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 system.
Coded language turned everyday phrases about everyday events into something that looked like nonsense to outsiders, and why that secrecy was often a side effect of economy rath...
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September 13, 2026 • 43 mins
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 the International Space Station, he returned milliseconds younger than his identical twin. But microgravity had also affected his eyesight, bones, blood, gut microbiome, body te...
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September 9, 2026 • 41 mins
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 supplements survive digestion and reach the skin in any meaningful form.
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For more information about Cancer Research UK, their research, breakthroughs and how you can ...
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September 6, 2026 • 55 mins
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 remarkable question of whether the eye can register a single particle of light.
This is an exploration of human senses at their most sensitive, blending physics and neuroscience with everyday experien...
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September 2, 2026 • 49 mins
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 at something astonishingly familiar: the size of a human egg cell.
Michael Stevens (VSauce) takes Professor Hannah Fry on a journey through powers of ten, from quarks and protons and DNA t...
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August 30, 2026 • 49 mins
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?
In this episode, Professor Hannah Fry and Michael Stevens (Vsauce) explore misophonia, the misunderstood sound sensitivity that can turn everyday mouth sounds into powerful emotional trigge...
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August 26, 2026 • 46 mins
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 and identity, Hannah and Michael investigate how language may shape our experience of the world.
Then, your questions. How fast would you need to throw a rock for it to escape Earth? What is th...
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August 23, 2026 • 65 mins
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 episode, Professor Hannah Fry and Michael Stevens (VSauce) explore where space really begins, why orbit means falling forever, and how Newton’s cannon explains the motion of t...
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August 19, 2026 • 54 mins
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 psychology of time, and each reveals something surprising about how our perception of time shapes the way we understand uncertainty and the world around us.
The conversation then turns to logic and...
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August 16, 2026 • 46 mins
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 strange journey from a molecule found in lizard venom to medicines reshaping diabetes and weight-loss treatment, exploring how GLP-1 helps regulate blood sugar, appetite and the hum of ‘food no...
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