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Some animals, like earthworms, snails, and spiders, have nerves but not actual brains.

A one-year-old child's brain weighs about 2 pounds (950 g), ten times the weight of a dog's brain.

The primate cortex is so large that it has to be folded to fit inside the skull. That's why the surface of the brain is wrinkly.

The nervous system runs on electricity, but the levels are low. Brain signals involve less than one-tenth the voltage of an ordinary flashlight battery.

American Museum of Natural History

Central Park West at 79th Street
New York, NY 10024-5192
Phone: 212-769-5100

Open daily from 10 am-5:45 pm
except on Thanksgiving and Christmas
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