A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
A lion in the wild usually makes no more than twenty kills a year.
186
A tortoise named Adwaita lived to 255 years old. To put it into perspective, he was born before the United States of America existed and his death was announced on CNN (1750-2006).
12
Gorillas can catch human colds and other illnesses.
205
The head of a jellyfish is called the "Bell."
6
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2
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
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8