Cows can sleep standing up, but they can only dream lying down.
745
Elephants are among the most emotional creatures in the world - they have even been known to rescue other animals, such as trapped dogs.
25
The pea aphid insect explodes itself thereby sacrificing its life to protect its relatives from predators.
3
It has been scientifically proven that stroking a cat can lower one's blood pressure!
456
Spiders have transparent blood.
56
Cockroaches can live for 9 days after their head has been cut off.
140
The male platypus has poisonous spurs on its legs.
58