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
In 1918, a homing pigeon saved over 190 American soldiers by delivering a message to nearby support despite having been shot through the breast, blinded in one eye, covered in blood, and with a leg hanging on by just a tendon.
22
The colossal squid has the largest eyes in the world.
4
Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
12
Squirrels forget where they hide about half of their nuts.
698
Sloths take two weeks to digest their food.
243
Jumping fleas can accelerate 50 times faster than the space shuttle.
218