Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Cats and dogs can hear ultrasound.
350
The reindeer is the only mammal that can see UV light.
17
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2