One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
A giraffe's kick is so powerful that it can decapitate a lion.
216
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Cats and dogs can hear ultrasound.
350
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
The oldest recorded elephant lived for 82 years.
213
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11