A shark is the only fish that can blink with both eyes. See more

The rat has been called the world’s most destructive mammal - other than man. See more

The blue whale has a heart the size of a small car and its blood vessal is so broad, that a person could swim through it. See more

In ancient Egypt, killing a cat was a crime punishable by death. See more

A shrimp's heart is in its head. See more

Turtles can breathe through their butts. See more

One pair of rats has the potential for 15,000 descendants in a year. See more

Don't give a dog chocolate! Chocolate affects a dog's heart and nervous system; a few ounces are enough to kill a small dog. See more

Fish that live more than 800 meters below the ocean surface don't have eyes. See more