Cats recognise the voice of their owner, but never evolved to care.
22
The reindeer is the only mammal that can see UV light.
17
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Giant Anteaters' front legs look like a panda.
48