The praying mantis is the only insect known to have a single ear, located on the underside of its belly.

Some frogs can survive being frozen during winter.

Fact #24 · Animals

Certain birds use thermal air currents to glide efficiently.

Fact #499 · Animals

A sea star can regrow lost arms.

Fact #425 · Animals

A blue-ringed octopus carries venom potent enough to affect humans.

Fact #370 · Animals

Blue whales can grow longer than 90 feet.

Fact #341 · Animals

A giraffe's heart can weigh over 20 pounds.

Fact #447 · Animals

The Arctic fox changes fur color with the seasons.

Fact #373 · Animals

A dolphin’s brain is relatively large compared to its body size.

Fact #456 · Animals