Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Alligators can live up to 100 years.
337
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
Rattlesnake mating sessions have been known to last more than 22 hours.
232