The smell of rain has a name — petrichor — and it's caused by bacteria, oils, and ozone.

The ozone layer helps protect Earth from harmful ultraviolet radiation.

Fact #52 · Nature

The Arctic Circle experiences extreme variations in daylight.

Fact #63 · Nature

Some species of jellyfish glow in the dark.

Fact #357 · Nature

Tyrannosaurus rex had one of the strongest bites of any land animal.

Fact #667 · Nature

Some trees can communicate with each other using underground fungal networks.

Fact #2027 · Nature

Some prehistoric amphibians grew several feet long.

Fact #709 · Nature

Coral reefs are built by tiny animals called coral polyps.

Fact #654 · Nature

A jellyfish moves by pulsing its bell-shaped body.

Fact #506 · Nature