The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Penguins have a gland above their eye that turns saltwater into freshwater.
12
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
The cat brain weighs about 30g.
167
Moths are unable to fly during an earthquake.
328
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2