S2017 E1 • Should We Grow Human Organs In Pigs?

An amazing new technology will let scientists grow new kidneys for patients using their own stem cells inside of pigs.

Première diffusion : 25 janvier 2017

S2017 E2 • Why Is Poop Brown And Pee Yellow?

The pigments in our food all get destroyed on their way through our digestive system...so where do the colors of our poop and pee come from?

Première diffusion : 2 février 2017

S2017 E3 • How Physics Saved Two Million Premature Babies

Doctors beat back a disease that was killing tens of thousands of babies a year with a machine based on a simple principle of physics.

Première diffusion : 14 février 2017

S2017 E4 • Why Did T Rex Have Such Tiny Arms?

It's easy to assume that every trait - including stubby arms on a terrifying predator - must be beneficial, but the forces of evolution don't really work like that.

Première diffusion : 22 février 2017

S2017 E5 • Why Are Snakes So Creepy?

Snakes occupy a special place in the human brain because they’re so weird.

Première diffusion : 2 mars 2017

S2017 E6 • Why Perfume Makers Love Constipated Whales

How whale poop becomes perfume. Thanks to Crunchyroll for sponsoring this video!

Première diffusion : 7 mars 2017

S2017 E7 • Why Is A Group Of Crows Called A “Murder”?

Collective nouns are a great way to have fun with language and nature.

Première diffusion : 15 mars 2017

S2017 E8 • What Makes A Dinosaur?

Due to a revolution in our understanding of the tree of life, birds are dinosaurs, while dimetrodons are not.

Première diffusion : 28 mars 2017

S2017 E9 • How Cats Became our Feline Overlords

Check out how cats became our favorite little murder machines.

Première diffusion : 12 avril 2017

S2017 E10 • Why Some Molecules Have Evil Twins

A tiny change in a molecule’s geometry completely changes its effects on the human body.

Première diffusion : 19 avril 2017

S2017 E11 • Why Don’t Sheep Shrink In The Rain?

Getting wet isn’t REALLY what makes wool shrink; it merely exacerbates the friction between the wool fibers, which is stronger in one direction than another, so when agitated in the washer or dryer, they migrate in relation to each other in a process called “felting.”

Première diffusion : 26 avril 2017

S2017 E12 • Why Don't Sled Dogs Ever Get Tired?

Sled dogs are the best endurance athletes in the world thanks to a weird quirk in their metabolism.

Première diffusion : 3 mai 2017

S2017 E13 • Why Most Rain Never Reaches The Ground

Less than half of the rain that falls from a cloud makes it all the way to the ground – because a lot evaporates while falling or after landing in treetops.

Première diffusion : 10 mai 2017

S2017 E14 • Why Apple Pie Isn't American

Our diets are more global than we realize, because our common food crops and animals were domesticated far away in diverse locations.

Première diffusion : 24 mai 2017

S2017 E15 • This Is Not A Bee

It can be hard to distinguish bees from all the other insects out there that look like bees.

Première diffusion : 31 mai 2017

S2017 E16 • Why Does Wine Make Your Mouth Feel Dry?

Première diffusion : 15 juin 2017

S2017 E17 • What Nuclear Bombs Taught Us About Whales

A monitoring system developed to listen for secret nuclear tests mostly hears other events happening all around Earth.

Première diffusion : 21 juin 2017

S2017 E18 • Why So Many Meteorites Come From The Same Place

Because of space physics, one faraway asteroid is likely the progenitor of almost a third of all the meteorites on Earth.

Première diffusion : 6 juillet 2017

S2017 E19 • Invasion Of The Earthworms!

Worms cause major changes to ecosystems, but those changes aren’t always new.

Première diffusion : 12 juillet 2017

S2017 E20 • Why It Sucks to Be a Male Hyena

Thanks to spotted hyenas’ unusual social structure, males experience a tough life of solitude, harassment, and deprivation.

Première diffusion : 19 juillet 2017

S2017 E21 • TRANSPARENT Solar Panels?!

Infinitesimally small quantum dots can turn a window into a see-through solar panel!

Première diffusion : 27 juillet 2017

S2017 E22 • UPSIDE-DOWN Rivers On Mars?!

The "Mountain or Valley?" illusion makes our brains turn valleys inside out. But inside-out valleys are a real thing, both on Earth and on Mars.

Première diffusion : 2 août 2017

S2017 E23 • Our Definition For “Moon” Is Broken

It’s becoming harder and harder to categorize moons as moons.

Première diffusion : 15 août 2017

S2017 E24 • Why Is Syrup Sticky?

What exactly makes sugary syrups so sticky, when neither water nor sugar is very sticky on its own?

Première diffusion : 24 août 2017

S2017 E25 • Why Do India And China Have So Many People?

India and China have so many people today because they’re good for farming and big, but they’ve always been that way, so they’ve actually had a huge proportion of Earth’s people for thousands of years.

Première diffusion : 31 août 2017

S2017 E26 • Why Is Your Grandma So Short?

Nutrition during the first few years of life has a huge impact on adult height, and since nutrition has been getting better over time, humanity - including your family - is getting taller.

Première diffusion : 22 septembre 2017

S2017 E27 • Why Farming Is Broken (And Always Has Been)

To feed everyone in the future, we may need to disrupt 10,000 years of farming practices and turn agriculture into a closed system.

Première diffusion : 27 septembre 2017

S2017 E28 • Why Do Female Hyenas Have Pseudo-Penises?!

Female hyenas don't have penises, but it sure looks like they do - and we still aren't quite sure why.

Première diffusion : 4 octobre 2017

S2017 E29 • Where Do Our Drugs Come From?

The incredible chemical weapon-making abilities of fungi, bacteria, and plants have created a diverse array of compounds that are useful to humans.

Première diffusion : 13 octobre 2017

S2017 E30 • Why Bird Penises Are So Weird

Male birds have the largest genital diversity of any class of animals because their sex chromosomes make it easy to pass male-helping mutations down the line.

Première diffusion : 25 octobre 2017

S2017 E31 • What Are Brain Waves?

Even the parts of our brains that don't control physical movement show a lot of rhythm, and that might be integral to how our brains work.

Première diffusion : 7 novembre 2017

S2017 E32 • Why Do Some Animals Get Gigantic?

Occasionally, internal or external factors change, allowing certain animals to become giant versions of themselves.

Première diffusion : 24 novembre 2017

S2017 E33 • Why Pets Have Surprisingly Small Brains

When we domesticate an animal species, their brains shrink and they freak out less.

Première diffusion : 6 décembre 2017

S2017 E34 • Are 'Acts of God' Disappearing?

Considering humans' increased impact on the environment, we may want to reconsider whether there is still a place in our legal system for the Act of God defense.

Première diffusion : 13 décembre 2017

S2017 E35 • Why Do Birds Migrate Like This?

Migrating birds care more about the ease of their trip than the distance they travel, and that leads to some truly roundabout routes.

Première diffusion : 20 décembre 2017