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Grey hairs sometimes regain their colour when we feel less stressed.

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woxZY TIL of Emogame, a series of browser flash games in which you, fight through levels of "enemies" which have "bad taste in music", including throwing vinyl records at members Dave Matthews Band and Creed.
X0vDj TIL about the "Judas Wolf technique". This involves capturing a wolf in a net and putting a radio collar on it to lead government-contracted shooters back to its pack so they can be killed.
AgBd TIL that Magnum condoms are designed for most men to fit into so that most purchases include an ego boost
N71xe TIL about Baun the Cat, a cat in Russian fairy tales that has a voice that can cure any sickness. The cat mostly uses its voice to make people sleep in order to eat them though. In stories, the only way to defeat this cat was to wear an iron helmet to block its voice.
dDXPj TIL in the 1800s the USDA gave farmers an herbicide to combat ragwort, a weed toxic to horses and cows. They'd spray sodium chlorate but get some on their pants. The dried sodium chlorate was high highly flammable leading to an epidemic of EXPLODING PANTS.