When cats are happy, they may squeeze their eyes shut.
10
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20