The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
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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.
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Dolphins have names for one another.
18
Whales and dolphins can't taste anything other than salt.
11
There's a competition in Sweden called Kaninhoppning, or rabbit show jumping.
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Parrotfish make themselves a kind of mucus 'sleeping bag' which masks their smell from predators and keeps parasites away.
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