Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
A cow produces around 200,000 glasses of milk in her lifetime.
373
Dolphins have names for one another.
18
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492