The Carthaginian general Hannibal crossed the Alps with war elephants to invade Italy in 218 BC.

The Earth's surface is constantly reshaped by natural forces.

Fact #224 · Animals

A chimpanzee can use tools to solve problems.

Fact #508 · Animals

Certain birds can recognize themselves in mirrors.

Fact #404 · Animals

A hummingbird's heart can beat over 1,000 times per minute.

Fact #345 · Animals

Some insects can walk on water due to surface tension.

Fact #374 · Animals

Some frogs can survive being frozen during winter.

Fact #24 · Animals

Archaeopteryx is considered a transitional fossil between dinosaurs and birds.

Fact #624 · Animals

Some marine snails use venom to capture prey.

Fact #432 · Animals