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TIL the ‘tattoo gun’ that artists commonly use today was originally a pen that could write through multiple pieces of paper invented by Thomas Edison in 1876. It was modified in 1891 for use with tattooing.

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VBn1p TIL Irish-American dancer and Michael Flatley's shows have grossed over a $1 Billion. He was forced to retire in '16 due to an irreparably damaged spine, injured left knee, a torn right calf, two ruptured Achilles tendons, a fractured rib, and a recurring broken bone in his foot.
oRVRR TIL you can make cloth from milk
oBQGE TIL 2.4 GHz Wi-Fi adapters run much faster when plugged into USB 2.0 ports because USB 3.0 ports can emit broadband noise that interferes with the radio frequency on 2.4 GHz devices
ANLEn TIL that Stephen Lee was one of three anti-Apartheid activists who escaped from Pretoria Prison in 1979. In 1980, the warden in charge that night was put on trial for aiding their escape. Lee wrote a letter to a South African newspaper proclaiming his innocence. The warden was eventually acquitted.
R7bgl TIL a coconut crab can grow up to 1m in length, actually cracks open coconuts with its claws, and can't swim.