Cats recognise the voice of their owner, but never evolved to care.
22
The cat brain weighs about 30g.
167
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
A group of kittens is called a "kindle".
10
The elephant brain weighs about 6,000g.
274
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217