It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Cows can sleep standing up, but they can only dream lying down.
745
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
The oldest known animal in the world was 'Ming' the 405 year old clam, discovered in 2007.
492
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79