A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
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 reindeer is the only mammal that can see UV light.
17
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79