Gorillas can catch human colds and other illnesses.
205
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Early American humans hunted car-size armadillos and used their shells for houses.
12
The largest earthworm on record was found in South Africa and measured 22 feet.
151
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Cows can sleep standing up, but they can only dream lying down.
745