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What If Humans Disappeared?

Adults Human
If we suddenly disappeared, what would happen to our planet?

How Many Smells Can You Smell?

Adults Human
How do we smell?

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?

Why Music Moves Us

Adults Human
Why does music make us feel happy or sad? Or angry or romantic? How can simple sound waves cause so much emotion? I went from my comfy chair to the streets of Austin to investigate how it might be written into our neuroscience and evolution. Modern neuroscience says our brains may be wired to pick certain emotions out of music because they remind us of how people move!

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.

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.

Watch This Smart Crow Ask Human For A Drink

Adults Human
Thirsty crow comes to humans for help

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.

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?

How sugar affects the brain

Adults Human
When you eat something loaded with sugar, your taste buds, your gut and your brain all take notice. This activation of your reward system is not unlike how bodies process addictive substances such as alcohol or nicotine -- an overload of sugar spikes dopamine levels and leaves you craving more. Nicole Avena explains why sweets and treats should be enjoyed in moderation.

The Invisible Universe Of The Human Microbiome

Adults Human
The next time you look in a mirror, think about this: In many ways you're more microbe than human. There are 10 times more cells from microorganisms like bacteria and fungi in and on our bodies than there are human cells. But these tiny compatriots are invisible to the naked eye. So we asked artist Ben Arthur to give us a guided tour of the rich universe of the human microbiome.

Emotional baby! Too cute!

Adults Human
She was only ten months old when this video was taken, her reaction is priceless !