Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
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
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
34
The head of a jellyfish is called the "Bell."
6
Condoms were originally made of animal intestines or linen.
347
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328