When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Bats sleep 18-20 hours per day.
5
The reindeer is the only mammal that can see UV light.
17
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328