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TIL Thomas Edison fabricated the Electric Chair as part of a smear campaign designed to paint Nikola Tesla's Alternating Current (AC) power as more dangerous than Edison's Direct Current (DC) power.

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M7rlB TIL about the first wearable computer
R7EvQ TIL a German nun left heartbroken after seeing leprosy patients in Pakistan, where it was believed as a punishment from God & patients were ostracized, left everything behind & moved there to fight leprosy alone. She got the country (then population of 127 million) rid of disease.
MepAB TIL when Consumer Reports surveyed the reliability of 1975 cars, Volvo turned out to be the second-worst car brand, and behind all the Big Three US brands in reliability.
QJ7Na TIL the Wood Frog can go eight months without peeing. While it hibernates, it uses the urea (the main waste in urine) to protect their cells and tissues, even as the critters heart, brain and bloodstream stop.
QN8Vd TIL: Paper planes were not made to mimic air planes. They predate airplanes by more than 2000 years.