Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5
A group of pugs is called a grumble.
10
Cats recognise the voice of their owner, but never evolved to care.
22
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
A 42-foot sperm whale has about 7 tons of oil in it.
209
Cows can sleep standing up, but they can only dream lying down.
745