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
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Mosquitoes don't just bite you, they also pee on you.
11
In Australia, there are spiders big enough to eat snakes.
20
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6