Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Dogs have been man's pet for over 14,000 years.
224
Denmark has twice as many pigs as there are people.
66
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
A dairy cow can produce more milk when listening to music.
446
Cats recognise the voice of their owner, but never evolved to care.
22