If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
Poon Lim survived 133 days alone on a raft at sea by fishing, drinking bird blood, and killing a shark with a jug of water.
21
In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
151
Sniffologists have the job of sniffing armpits.
4
Australian Graham Barker has been collecting his own belly button fluff every day since 1984 - keeping it in storage jars.
15
Condoms were originally made of animal intestines or linen.
347