The world's largest employer is the US Department of Defense — with 3.2 million employees.

Some species of jellyfish are biologically immortal under certain conditions.

Fact #159 · Animals

Certain frogs use bright colors to warn predators.

Fact #438 · Animals

Some species of ants wage organized territorial battles.

Fact #401 · Animals

A hammerhead shark’s wide head improves its sensory range.

Fact #569 · Animals

The largest known dinosaur species were long-necked sauropods.

Fact #630 · Animals

Elephants can detect distant thunderstorms through ground vibrations.

Fact #347 · Animals

Certain fish can produce their own light through bioluminescence.

Fact #372 · Animals

A wolf's howl can travel several miles.

Fact #427 · Animals