The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
Cats recognise the voice of their owner, but never evolved to care.
22
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6