When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Cats and dogs can hear ultrasound.
350
Bats sleep 18-20 hours per day.
5
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13