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TIL The treadmill originated in prisons and were used to pump water or crush grain

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Mj5A TIL during China’s Ming Dynasty, powdered smallpox scabs were blown up the noses of the healthy. The patients would then develop a mild case of the disease, & from then on were immune to it. Although the technique had a 0.5–2.0% mortality rate, it was better than the diseases 20–30% mortality rate.
LVdm TIL that before making “Team America,” Trey Parker and Matt Stone intended to make a shot-for-shot puppet parody of “The Day After Tomorrow.”
OavL TIL that ‘Pudding Guy’ David Phillips accumulated 1,253,000 frequent flyer miles in 30 days by finding a loophole in a Healthy Choice Foods company promotion.
GAy81 TIL the male common rain frog is much smaller than his female counterpart so they mutually secrete a glue like substance to hold them together for reproduction. This glue can hold them together for days to months.
4kVoN TIL about The Battle of Stamford bridge. Where a lone Viking warrior attempted to hold off an army of nearly 15,000 men. The unnamed viking was able to take down 40 men before falling.