The blue whale's heart is so large a small child could crawl through its aorta.

Some fish use tools to crack open shellfish.

Fact #405 · Animals

Some species of turtles can breathe through their cloaca underwater.

Fact #365 · Animals

A camel can drink large amounts of water in a short time.

Fact #458 · Animals

Some mammals hibernate during winter.

Fact #303 · Animals

Whales are mammals and must breathe air.

Fact #265 · Animals

Some birds can imitate sounds from their environment.

Fact #489 · Animals

Some birds build elaborate nests.

Fact #308 · Animals

Some beetles can lift objects many times their own weight.

Fact #378 · Animals