Condoms were originally made of animal intestines or linen.
347
Camels and llamas can cross breed. The offspring is called a ‘Cama’.
10
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
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12