Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
Sharks have been on the planet longer than trees.
14
Gorillas can catch human colds and other illnesses.
205
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17