Sharks have been on the planet longer than trees.
14
Cows can sleep standing up, but they can only dream lying down.
745
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Cats sleep for 70% of their lives.
8
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492