A dairy cow can produce more milk when listening to music.
446
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
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
The elephant brain weighs about 6,000g.
274
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4