Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
There are approximately three chickens for every human on Earth.
13
The reindeer is the only mammal that can see UV light.
17
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Sheep, goats, octopuses, and toads have rectangular pupils.
7
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
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