One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Sloths take two weeks to digest their food.
243