The Rest Is Science

The statistical reality of "The World's #1 Dad Mug" is nothing but a well meaning lie. In this episode of The Rest Is Science, Michael brings another treasured artifact into the studio: a mug gifted by his daughter. Rather than claiming the top spot, the mug features a specific, mathematically defensible ranking of his fatherly abilities. If he's not the very best...surely he's in the top percenti...

Stubbing your toe feels like the pain is entirely in your foot. But the reality is far stranger... the agonising sensation you experience is actually a highly complex, constructed illusion, invented in real-time by your brain. In this episode of The Rest Is Science, Professor Hannah Fry and Michael Stevens (VSauce) explore the weird neuroscience of human pain and why pain is ultimately a brilliant...

When you think of dangerous geological specimens, does your mind jump straight to radioactive uranium, toxic heavy metals, or even asbestos? What if one of the most dangerous items sitting on a shelf is actually a polished, perfectly ordinary-looking piece of black obsidian? Professor Hannah Fry and Michael Stevens dive into the surprisingly treacherous geology and chemistry of obsidian. Hannah br...

Your ears are lying to you right now. In this episode of The Rest Is Science, Professor Hannah Fry and Michael Stevens (Vsauce) dive into the bizarre world of audio illusions where your brain hears sounds that don't exist, fills in frequencies that were never there, and constructs a version of reality that simply isn't real. From the impossible endless ascending tone to the battle between your eye...

A pen designed to write in space sits unopened for 25 years. Does it still work? In this episode of Field Notes, Michael Stevens finally opens a treasured souvenir from his time at Space Camp: a genuine Fisher Space Pen that has been waiting decades for its first scribble. From there, the conversation launches into the challenges of living in space, why astronauts abandoned pencils, and what happe...

What will humanity leave behind? In this episode, Professor Hannah Fry and VSauce's Michael Stevens explore the traces humans leave behind and what those traces reveal about how we think. From Tranquility Base, where humanity's first footprints on another world still sit undisturbed in lunar dust, to a three million year old pebble that may represent one of the earliest signs of symbolic thought,...

Most living things vanish without a trace. A select few become fossils. But how? In this episode of Field Notes Professor Hannah Fry and VSauce's Michael Stevens dig into the unlikely process that turns bone into stone. From prehistoric seas hidden beneath Kansas to fossils mistaken for mythical creatures, they follow the clues that reveal Earth's deep past. Along the way they uncover the lost lan...

Compared with almost every other animal on Earth, our feet seem strangely specialised. They can't grip branches, they're full of arches and joints, and for some reason we're the only species that regularly puts shoes on them. Hannah and Michael explore how millions of years of evolution transformed ape like feet into powerful biological springboards, uncovering a surprising connection between huma...

Most people use just a fraction of the words they understand. But how big is your vocabulary, really? When a listener builds a tool that claims to measure it, Hannah and Michael put themselves to the test. If you'd like to try for yourself, follow the link and tell us what score you get in the comments: https://vocabowl-870366514258.us-west1.run.app/ Along the way they uncover forgotten words, obs...

Do you think your thoughts belong to you? How would feel if you found out they don't? In this episode Hannah and Michael discuss a tangible future where the last bastion of privacy is breached and the thoughts that run through out heads no longer belong to us. Why is it that in 2026 police can open your phone using face ID any time they want, but they can't do the same with your password? When mig...

What do lightning, wireless electricity, Cambridge dining etiquette, hypnosis, and a lovestruck pigeon have in common? The answer is (of course) Nikola Tesla. In this episode of The Rest Is Science: Field Notes, Michael and Hannah experience a real Tesla coil, exploring the spectacular physics behind one of Tesla's most famous inventions. Why do these devices create miniature lightning storms? How...

Is there a new way to make twins? If there is, Michael's might just have discovered it. And hint: it's going to hard work. From Hannah’s twin-like sister to the most famous cells in human history, in this episode Hannah and Michael continue to explore whether we truly own of ourselves, this time at a microscopic level. From our genome, to our cells and even our personalities, what happens in a fut...

What can be revealed about a person by their choice of…lead? In this gloriously nerdy episode of Field Notes, Michael Stevens arrives armed with an entire collection of mechanical pencils, sparking a series of passionate debates about graphite, the merits of ink, and whether the perfect pencil will ever really exist. Plus: what happens to fizzy drink bubbles in zero gravity? Why did early scientis...

What happens to a body part once it’s been removed from your body? Can you take it home? Cremate it? Bury it? Even give it a funeral? In the first episode of a new mini-series on ownership, Hannah and Michael explore a deceptively simple question: what parts of ourselves do we actually own? From amputated limbs and stolen skulls to black markets for human organs, they uncover the strange, unsettli...

What if the next pandemic could be predicted before it even begins? Hannah and Michael step into the unsettling world of outbreak simulations, where scientists map invisible infections, model human behaviour, and try to stop global catastrophe before it starts. Some warnings save millions. Others get ignored, until it’s too late. After the break the conversation takes a turn into space stations, f...

Why are black cars more dangerous, white chess pieces more successful, and pandas apparently incapable of coping with minor inconvenience? Professor Hannah Fry and Michael Stevens (VSauce) unpack one deceptively simple question - which would win in a fight between black and white? - and end up exploring everything from colour psychology and radioactive frogs to quasars, fantasy literature, and whe...

What if one of the most valuable objects on Earth has been sitting untouched at the bottom of the ocean for 100 million years? In this Field Notes episode, Professor Hannah Fry brings Michael Stevens (VSauce) a strange metallic rock formed in the deepest parts of the Atlantic over millions of years. What begins with a bizarre Cold War CIA cover story involving Howard Hughes and a sunken Soviet sub...

* This episode contains descriptions of warfare and use of chemical weapons * How do you feed a world that’s running out of food? In this episode of The Rest Is Science, Hannah Fry and Michael Stevens uncover one of the strangest and most unsettling stories in modern science: the tale of the man who learned how to pull fertiliser out of thin air. This discovery transformed agriculture. It made mod...

Why does one of the most familiar numbers on a nutrition label turn out to be far more complicated than it looks? What can a can of fizzy drink teach us about thermodynamics, human metabolism, and the strange ways scientists measure energy? Professor Hannah Fry and VSauce’s Michael Stevens dive into the weird science of calories. From century-old experiments involving fire, body heat, and human di...

What if the universe is recording everything you’ve ever seen and done? In this episode, Hannah Fry and Michael Stevens explore the idea that light itself might carry a record of the past. And if it did, how could we watch history unfold by capturing it. Could a perfectly placed mirror or even a black hole bend that ancient light back to us? Could we watch the pyramids being built, or hear Einstei...

What can a humble airplane sick bag teach us about physics, engineering, and the limits of the human stomach; And why are there people out there collecting thousands of them? Professor Hannah Fry and VSauce’s Michael Stevens turn an unlikely holiday prompt into a surprisingly rich exploration of flight. From the biology of motion sickness to the physics of turbulence, and from exploding crisp pack...

How does a perfectly symmetrical ball of cells become an animal, with a head, a tail, and complex zebra or leopard like patterns? In this episode, we dive into the mind bending science of how order emerges from chaos, guided by an unexpected genius: Alan Turing. From leopard spots and human embryos to crime hotbeds, Hannah and Michael discover the hidden mathematical rules shaping life itself…and...

How do you convince people you aren't a witch if you travel back in time, and where can you actually find something decent to eat when you're there? Professor Hannah Fry and VSauce, Michael Stevens, tackle the most practical and delicious logistics of surviving a trip through history. Check out one of Hannah's favourite chemistry YouTube channels - https://www.youtube.com/@cnliziqi ---------------...

Why do almost all of us struggle with a simple reasoning test, yet get it right the moment it’s about a pint in a pub? This week, Professor Hannah Fry and Michael Stevens take on the Wason Selection Task, one of the most intensely studied problems in the history of psychology. They unpack why a rule involving letters and numbers can feel strangely difficult, while the exact same logic becomes imme...

Does a teapot secretly hold the laws of physics? And what do soap, sugar and mint have to do with the perfect cup of tea? Whilst in Morocco, Professor Hannah Fry takes Michael Stevens (VSauce) into the surprising science of mint tea, from foamy bubbles that trap desert sand to the elegant S-shaped spout that appears to solve some of the hardest problems in fluid dynamics. Plus, your questions, inc...