A cloud can weigh more than a million tons.

Certain birds build nests on cliffs for protection.

Fact #531 · Animals

Certain fish live in symbiotic relationships with other species.

Fact #535 · Animals

Certain fish can survive in oxygen-poor water.

Fact #453 · Animals

Certain frogs can inflate themselves to appear larger to predators.

Fact #377 · Animals

Some amphibians can absorb oxygen through their skin.

Fact #328 · Animals

A crocodile can replace its teeth multiple times in its life.

Fact #406 · Animals

Certain fish change sex during their lifetime.

Fact #503 · Animals

A wolf can travel dozens of miles in a single day.

Fact #545 · Animals