The Iditarod sled dog race covers 1,600 km across Alaska — mushers and their teams face temperatures of −60°C.

Blizzards are intense snowstorms with strong winds.

Fact #819 · Nature

Sinkholes can form when underground rock dissolves.

Fact #827 · Nature

The oldest known living tree sprouted before the Egyptian pyramids were built.

Fact #2229 · Nature

The sea turtle’s streamlined shell aids in efficient swimming.

Fact #903 · Nature

Apples float in water because 25% of their volume is air.

Fact #3415 · Nature

Some plants can communicate.

Fact #1700 · Nature

A jellyfish moves by pulsing its bell-shaped body.

Fact #506 · Nature

Some desert plants store water in thick, fleshy stems.

Fact #858 · Nature