Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Cows can sleep standing up, but they can only dream lying down.
745
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20