A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Mosquitoes don't just bite you, they also pee on you.
11
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
Cats and dogs can hear ultrasound.
350