The fastest animals in the world fly, swim, and run on land. Most of them are birds you probably have never seen before, especially the Frigate Birds that can stay up in the sky for a week.Here are ...

A shortfin mako shark, the fastest-swimming shark in the world, was caught on camera with an octopus catching a ride on its back off the coast of New Zealand.

Dolphins live and hunt in large social groups called pods, and they communicate with each other using high-pitched clicks and whistles. They are very intelligent because they have to work together to ...