Australian Graham Barker has been collecting his own belly button fluff every day since 1984 - keeping it in storage jars.
15
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
Most of the dust underneath your bed is actually your own dead skin.
251
Condoms were originally made of animal intestines or linen.
347
In Brazil, there's a species of cockroach that eats eyelashes, usually those of young children while they are asleep.
151