Penguins have a gland above their eye that turns saltwater into freshwater.
12
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
Condoms were originally made of animal intestines or linen.
347
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
Dogs have been man's pet for over 14,000 years.
224