Jellyfish as a species are actually older than dinosaurs and sharks.
383
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
Sharks, like other fish, have their reproductive organs in their chests.
248
There's a phone app called RoboRoach that allows you to remotely control a cockroach through a chip that you to manually implant into the unwitting critter.
10
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
A giraffe's kick is so powerful that it can decapitate a lion.
216
Cats and dogs can hear ultrasound.
350