A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250
Cats recognise the voice of their owner, but never evolved to care.
22
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
Sharks have been on the planet longer than trees.
14
When you shave a guinea pig it looks like a little hippo.
19
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20