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TIL nude means “unclothed” while naked means “unprotected”

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8a6R8 TIL that in the 1952 polio epidemic in Denmark, mortality was over 85 per cent due to a shortage of respirators. Dr Bjorn Ibsen invented a new kind of ventilator, proved it worked and then recruited thousands of volunteers to hand-pump them for weeks (they were fully manual). Mortality fell to 26%.
dDY0Q TIL that Richard Feynman, winner of the 1965 Nobel Prize in physics, tried marijuana and ketamine in John Lilly's sensory deprivation tanks as a way to study consciousness.
neJgB TIL Harrison Schmitt, the last man to walk on the moon, had an allergic reaction to moondust
p8n1p TIL that in 2008 Anonymous launched the project Chanology, sending endless loops of black pages to the Scientology church's fax machines to waste ink.
Vv6m TIL mountain goats are not actually goats, but members of the Antelope family