Pound for pound, spider silk is stronger than steel.

Arctic terns fly from the Arctic to Antarctica and back every year — the longest migration of any animal.

Popcorn was eaten by people in the Americas thousands of years ago.

Red leaves get their color from the same kind of pigment that makes cherries and blueberries colorful.

Butterflies taste with their feet.

Starfish don't have brains.

Honeybees can recognize human faces.