evolution

What would happen if every human suddenly disappeared?

Why we get mad -- and why it's healthy

Why don't poisonous animals poison themselves?

Four billion years of evolution in six minutes

Where joy hides and how to find it

How a new species of ancestors is changing our theory of human evolution

Why are sloths so slow?

The evolution of animal genitalia

The three different ways mammals give birth

Why do we itch?

Why do animals have such different lifespans?

Meet the tardigrade, the toughest animal on Earth

Nationalism vs. globalism: the new political divide

How your brain decides what is beautiful

Can a divided America heal?

Why the metric system matters

What will humans look like in 100 years?

How we're harnessing nature's hidden superpowers

Why do cats act so weird?

Why archaeology needs to transcend borders

Does grammar matter?

The science of skin color

Clues to prehistoric times, found in blind cavefish

Help discover ancient ruins -- before it's too late

Why the octopus brain is so extraordinary

How humans could evolve to survive in space

How artificial light affects our health

We can reprogram life. How to do it wisely

You have no idea where camels really come from

Why do women have periods?

What are animals thinking and feeling?

Why do some people go bald?

What explains the rise of humans?

Why we laugh

Do we see reality as it is?

The mathematician who cracked Wall Street