Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
The reindeer is the only mammal that can see UV light.
17
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Lurch, a Watusi bull, had the largest horns in the world.
32
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12