When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Gorillas can catch human colds and other illnesses.
205
The cat brain weighs about 30g.
167
Whales and dolphins can't taste anything other than salt.
11
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18