If superpowers were real: Super speed
Adults Human
What if super speed wasn't just the stuff of epic comic book stories? Is it scientifically possible to be super speedy? In this series, Joy Lin tackles six superpowers and reveals just how scientifically realistic they can be to us mere mortals.
Why is yawning contagious? - Claudia Aguirre
Adults Human
*Yaaawwwwwn* Did just reading the word make you feel like yawning yourself? Known as contagious yawning, the reasons behind this phenomenon have been attributed to both the physiological and psychological. It's been observed in children as young as four and even in dogs! Claudia Aguirre visits the many intriguing theories that might explain contagious yawning.
What If Humans Disappeared?
Adults Human
If we suddenly disappeared, what would happen to our planet?
How a wound heals itself
Adults Human
Our skin is the largest organ in our bodies, with a surface area of about 20 square feet in adults. When we are cut or wounded, our skin begins to repair itself through a complex, well-coordinated process. Sarthak Sinha takes us past the epidermis and into the dermis to investigate this regenerative response.
Why Am I Tired?
Adults Human
Why do we feel so tired all the time? Hannah Fry looks at the reasons modern life might be exhausting us, from irregular bedtimes to blue lights from our phones.
Why Your Brain Is In Your Head
Adults Human
Have you ever wondered why the brain is located where it is?
Can You Erase Bad Memories?
Adults Human
What if you could delete specific memories?
When The Lion Sees Its Rescuer
Adults Human
Lions aren't that cruel. They know how to show their gratitude.
This Girl Befriends A Dangerous Moray Eel
Adults Human
This unlikely friendship is really amazing.
GoPro: Diver Saves Sea Turtle
Adults Human
Divers off the coast of Mexico save a sea turtle that became tangled in rope.
How Much Sleep Do You Actually Need?
Adults Human
If you get too little, or too much, your brain could suffer.
How do we smell?
Adults Human
An adult human can distinguish up to 10,000 odors. You use your nose to figure out what to eat, what to buy and even when it's time to take a shower. But how do the molecules in the air get translated into smells in your brain? Rose Eveleth charts the smelly journey through your olfactory epithelium and explains why scent can be so subjective.
Jumpy
Adults Human
Jumpy, a Border Collie and Blue Heeler mix, has been training with his owner Omar von Muller ever since he was a puppy. In this video, he's demonstrating the famous "Skidboot" routine.
Usain Bolt vs. a Cheetah
Adults Human
The fastest man alive, Usain Bolt, runs a virtual race against nature's fastest land animal.
Why do we cry? The three types of tears
Adults Human
Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. Alex Gendler tracks a particularly watery day in the life of Iris (the iris) as she cycles through basal, reflex and emotional tears.
Why Do We Yawn?
Adults Human
What makes yawning so contagious?