The elephant brain weighs about 6,000g.
274
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
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Urechis unicinctus is a species of marine spoon worm that is widely referred to as the ‘penis fish’.
2