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

The animal with the largest brain in proportion to its size is the ant. They are the smartest species of insects with about 250,000 brain cells. See more

A bird "chews" with its stomach. See more

The sentence "the quick brown fox jumps over the lazy dog" uses every letter in the English language. See more

99% of all animal species that ever lived on Earth are now extinct. See more

Out of 20,000 species of bees, only 4 make honey. See more

Humans, bonobo monkeys, and dolphins are the only species that have sex for pleasure. See more