Rattlesnake mating sessions have been known to last more than 22 hours.
232
Early American humans hunted car-size armadillos and used their shells for houses.
12
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Alligators can live up to 100 years.
337
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
The most expensive cow in the world was sold in 2009 for $1.2 million.
-3
Penguins have a gland above their eye that turns saltwater into freshwater.
12