A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
There’s a bonobo named Kanzi who has learned to build a campfire and cook his own food.
8
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
A puppy is born blind, deaf, and toothless.
16