One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5