Parrot parents "name" their children with a signature call.
112
Dogs have been man's pet for over 14,000 years.
224
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The reindeer is the only mammal that can see UV light.
17
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20