A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Dogs have been man's pet for over 14,000 years.
224
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
A dork is a whale's penis.
327
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250