One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
A group of kittens is called a "kindle".
10
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
Condoms were originally made of animal intestines or linen.
347
Jellyfish as a species are actually older than dinosaurs and sharks.
383