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TIL during the manhattan project Albert Stevens was injected with plutonium without his knowledge or explicit consent. He survived over 20 years, accumulating a total radiation dose of 64 Sv - the highest known in any human being.

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R55Xa TIL that the FCC prohibits replications of the Emergency Alert System tone. Broadcasters misusing it can be sanctioned and fined. In 2013, the trailer for Olympus Has Fallen had EAS tones and cable providers were fined $1.9 million dollars.
dBpj TIL the hoverboard was invented for real in April 2016. Powered by six compact jet engines totaling 1000 HP (equivalent to four automobile engines), and stabilized with Segway-like algorithmic balancing, it has a flight time of 10 minutes using a camelbak filled with jet fuel.
epxAn TIL that males going through opioid withdrawal may also experience spontaneous ejaculations whilst awake
167yO TIL that the word “fragging” refers to a soldier’s deliberate or attempted killing of a fellow soldier, usually a superior. The term was coined by U.S. military personnel during the Vietnam War, during which there were nearly 900 documented and suspected fragging incidents from 1969 to 1972.
Z8X94 TIL Quinten Tarrentino at 16, lied about his age to get a job as an usher at the adult movie Theatre in Torrance, California stating however “I hated porno movies...it was the most ironic situation: I finally got a job at a movie theatre and it’s a place where I don’t want to watch the movies.”