Cats recognise the voice of their owner, but never evolved to care.
22
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
Sharks, like other fish, have their reproductive organs in their chests.
248
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79