A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
The elephant brain weighs about 6,000g.
274
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
40
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11