The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Sharks, like other fish, have their reproductive organs in their chests.
248
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20