Female kangaroos have three vaginas.
2
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Cows can sleep standing up, but they can only dream lying down.
745
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
In 1949, an official boxing match between a bear and a man was held. The bear won.
41