Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The Basenji dog is the only dog that is not able to bark.
4
The male seahorse carries babies and 'gives birth' to them instead of the female.
7
In 1949, an official boxing match between a bear and a man was held. The bear won.
41