Only 3% of bird species have penises.
0
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
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Dogs have been man's pet for over 14,000 years.
224
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4