The cat brain weighs about 30g.
167
An average cat has 1-8 kittens per litter and can have 2-3 litters per year. During her productive life, one female cat could have more than 100 kittens. A single pair of cats and their kittens can produce as many as 420,000 kittens in just 7 years.
10
Cows can sleep standing up, but they can only dream lying down.
745
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
Jumping fleas can accelerate 50 times faster than the space shuttle.
218
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
