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Condoms were originally made of animal intestines or linen.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
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
Cockroaches can live for 9 days after their head has been cut off.
140
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
Some Chinese-made hair bands were fashioned from recycled condoms.
131