One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Sloths take two weeks to digest their food.
243
Domestic pigs average a top speed of about 11 miles per hour.
182
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Gorillas can catch human colds and other illnesses.
205
The Basenji dog is the only dog that is not able to bark.
4
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2