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TIL that the first recorded vending machine was invented by Hero of Alexandria, an ancient Greek engineer, in the first century AD. It dispensed holy water in exchange for a coin.

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x6k1g TIL of Dr. Jochem Hoyer, a German transplantation surgeon who argued in favour of altruistic organ donations. After a colleague criticized him for praising "living donors as long as it is NOT you who has to donate" Hoyer donated a kidney to an unknown stranger to make a quote "very strong statement"
9447 TIL people built entire houses just to piss their neighbours off.
eWrb TIL that there were Muslim artists who depicted Mohammed in full or with a partially hidden face
R7eB4 TIL The World Health Organization identified homosexuality as a mental illness through 1992
AxDo TIL in 2005, a German television show was produced in which twelve male competitors donated their sperm to be sent to a lab in Cologne. At the lab, three doctors then observed the sperm as they “raced” toward an egg. The man with the fastest sperm won a new red Porsche.