Bats sleep 18-20 hours per day.
5
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Gorillas can catch human colds and other illnesses.
205
There are approximately three chickens for every human on Earth.
13
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
The elephant brain weighs about 6,000g.
274
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45