Some older/less efficient worker termites will develop 'backpacks' of toxic chemicals that explode when the termite is threatened. They are essentially used as suicide bombers when the colony is being attacked.
8
An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
Rattlesnake mating sessions have been known to last more than 22 hours.
232
Sloths take two weeks to digest their food.
243
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10