Sperm whales are named after the waxy substance found in their large heads called spermaceti. The spermaceti is an oil sac ...

Owls are some of the best-known birds in the world, famous for their hooting calls and their excellent eyesight. There are ...

Most people think of moths as small insects fluttering across porch lights, but some species greatly challenge that image.

In his new National Geographic series Pole to Pole, the actor ventures deep into the Amazon in search of creatures whose ...