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150 Years American Museum of Natural History

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Brain

What is the Brain?

The brain is the organ inside our skulls. Weighing about 3 pounds, it's our most complex organ. We use it to sense the world around us, think and feel, solve problems, and store memories. It's what makes us who we are.

Interior view of a donut-shaped room, patterned with orange dots over a purple background. The pattern creates the illusion that the room is turning.

What you see and what you think you see are different things. Find out what your brain doing behind-the-scenes!

Scientist Rob DeSalle answers kids' questions about the brain!

Test your sight and memory with these brain games.

Explore your nerves by creating a life-sized drawing.

See how good you're at recognizing emotions.

Use Braille to create a message for a friend.

Take the jellybean test to see how your sense of smell enhances taste.

How fast can you catch a falling ruler? Measure your reaction time.

Try this trippy experiment to fool your brain!

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