A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The largest earthworm on record was found in South Africa and measured 22 feet.
151
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
4
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
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