Dolphins have names for one another.
18
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
The penguin is the only bird that can swim, but cannot fly.
1
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
If you keep a goldfish in the dark, it will eventually turn white
408
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Iguanas have two penises!
55
