Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
A cow produces around 200,000 glasses of milk in her lifetime.
373
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
A zoo in China gave a gay penguin couple the opportunity to raise a chick.
11
The elephant brain weighs about 6,000g.
274