Cows can sleep standing up, but they can only dream lying down.
745
Rattlesnake mating sessions have been known to last more than 22 hours.
232
A blue whale's aorta (the main blood vessel) is large enough for a human to crawl through.
52
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
One million people each year are bitten by animals in the United States.
7
A dork is a whale's penis.
327
A pig's penis is shaped like a corkscrew.
22
Cats make over 100 different vocal sounds; dogs can make about ten.
26