Cats recognise the voice of their owner, but never evolved to care.
22
Denmark has twice as many pigs as there are people.
66
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
Only 3% of bird species have penises.
0
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2
The colossal squid has the largest eyes in the world.
4
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492