It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Macaques monkeys in Japan learned to steal purses and wallets, take out the coins, and use them to buy drinks and snacks from vending machines.
26
Cats and dogs can hear ultrasound.
350
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
The cat brain weighs about 30g.
167