Sharks have been on the planet longer than trees.
14
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
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
2