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
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Tigers can see 6 times better at night than humans.
305
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4