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TIL Volcanos in Hawaii can produce hair-like strands of glass called "Pele's Hair."

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4Djg TIL Fritz Haarman ran a butcher shop in post World War I Germany where he sold inexpensive meat to impoverished customers. Some were suspicious of his low prices and discovered he had murdered up to 50 boys and men and ground their bodies into sausage.
78V7 TIL that Diamonds evaporate when they reach 763 degrees Celsius. They just vanish, without leaving ash or anything.
M7Qda TIL, there was a Cocaine-infused tablet called “Forced March” taken on the North Pole Expedition by Shackleton. As label explains: “Allays hunger and prolongs the power of endurance.”
Zgya TIL men in the Victorian era frequently wore corsets, just like women of the time.
N74bJ TIL that despite his famous last name, before becoming president Franklin Delano Roosevelt inherited most of his wealth from his grandfather Warren Delano Jr., who made his fortune as a drug smuggler in China.