A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
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
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
A group of kittens is called a "kindle".
10