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TIL: Sweat has less electrolytes than the blood, so by sweating you are increasing the concentration of electrolytes in the blood

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Yp1vG TIL about 6 Tongan teenage boys who were shipwrecked and lived on the uninhabited island 'Ata for 18 months (1965-1966). The boys had set up a small commune, with a vegetable garden, hollowed-out tree trunks to collect water, a gym with odd weights, a badminton court, and a permanent fire.
pY9JA TIL Olive Oyl was the main character 10 years before Popeye in their original comic strip
gMnLy TIL that in 1995, Dutch electronics engineer Jan Sloot claimed to have invented a data sharing system that could store a complete movie in eight kilobytes; he died one day before signing a deal, and despite months of searching, the system's compiler program has never been found.
EgoMd TIL pigs were first commercially slaughtered in Cincinnati, which became known as "Porkopolis"; by the mid 1800s Cincinnati led the nation in pig processing.
xQ65 TIL 242 people died and at least 630 others were injured in a nightclub fire in Brazil in 2013. Everything could’ve been avoided if outdoor pyrotechnics hadn’t been used indoors and if people trying to get away hadn’t been trapped by security guards demanding their bills to be paid.