Cats recognise the voice of their owner, but never evolved to care.
22
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492