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
When cats are happy, they may squeeze their eyes shut.
10
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Dogs sometimes fake being sick to get attention.
26
Jellyfish as a species are actually older than dinosaurs and sharks.
383