A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
A dork is a whale's penis.
327
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8