Dogs have been man's pet for over 14,000 years.
224
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
Rattlesnake mating sessions have been known to last more than 22 hours.
232