Cats recognise the voice of their owner, but never evolved to care.
22
Whales and dolphins can't taste anything other than salt.
11
Sheep, goats, octopuses, and toads have rectangular pupils.
7
A cow produces around 200,000 glasses of milk in her lifetime.
373
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20