When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
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
Cows can sleep standing up, but they can only dream lying down.
745
Ants tend to survive in a microwave because they find the coolest spot and wait!
17
Cats recognise the voice of their owner, but never evolved to care.
22
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402