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TIL of the Boy Scout Nuclear Science Merit Badge. The requirements to receive the badge include building a Geiger counter, planting irradiated and nonirradiated seeds, and visiting an accelerator (research lab) or university where people study the properties of the nucleus or nucleons.

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Ay5x TIL that the first leaf blowers were insecticide misters that workers were misusing to blow leaves instead.
LWP TIL the cork screw is also called a “wine key” because it was invented by a man name Karl Wienke.
8aakL TIL in 1996 an instrument failure caused a plane to lose control and crash just after takeoff, killing 189 people. It was later determined that the device used to measure airspeed was blocked by a wasp nest
l7vpN TIL a nursing home in Finland ran a small scheme where they gave subsidised accommodation to students with the agreement that they would spent time with the elderly
kO99d TIL Dwarf-tossing in establishments that sell liquor is illegal in Florida