Some mammals, like bats, use echolocation.

The ozone layer is located in the stratosphere.

Fact #140 · Animals

Certain fish change sex during their lifetime.

Fact #503 · Animals

Some butterflies use mimicry to avoid predators.

Fact #556 · Animals

Certain birds of prey have exceptionally sharp vision.

Fact #434 · Animals

Some plants release chemicals to deter herbivores.

Fact #239 · Animals

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

Fact #224 · Animals

A hedgehog rolls into a spiny ball when threatened.

Fact #555 · Animals

Some species of octopus can escape through very small openings.

Fact #451 · Animals