Dogs have been man's pet for over 14,000 years.
224
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13
A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
The colossal squid has the largest eyes in the world.
4
Cows can sleep standing up, but they can only dream lying down.
745
It has been calculated that a single breath from a mature blue whale can inflate up to 2,000 balloons.
492