Condoms were originally made of animal intestines or linen.
347
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
Tigers can see 6 times better at night than humans.
305
Sharks have been on the planet longer than trees.
14
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
Penguins have a gland above their eye that turns saltwater into freshwater.
12