The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
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
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
The Basenji dog is the only dog that is not able to bark.
4
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9