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TIL: 129 years ago today Nellie Bly went undercover at a lunatic asylum to uncover the truth about how people were begin treated

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l7vlN TIL "Kinoautomat", directed by Radúz Činčera, and made for the Czechoslovak pavilion at Expo 67 in Montreal, Canada, is the world's first interactive movie.
b9Dap TIL M&M's were created for the US Army so that soldiers could carry chocolate in tropical climates without it melting
MDXA TIL that President Roosevelt introduced a tax rate of 79%, but the threshold was so high that it was only paid by John D. Rockefeller
MeEVm TIL that because of the skin affect and the relatively high frequency of the plasma created by a tesla coil, and the low current. You can touch the output of a small coil, and instead of it going through you, shocking you, it will pass over your skin into the ground
D1Ejj TIL about the polio epidemic of August 1952 in Copenhagen, Denmark. This epidemic ushered in the widespread use of positive-pressure ventilation, replacing the negative-pressure iron lung machine. It is also during this time that the concept of an intensive-care unit (ICU) was first introduced.