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TIL your brain/eyes will generate a "light show" (known as the Prisoner's Cinema) if kept in darkness for long periods of time. The phenomenon is reported by prisoners confined to dark cells and by others kept in darkness as well as; truck drivers, pilots and practitioners of intense meditation.

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7rBPx TIL that in 2019, singer Mike Posner announced he would walk completely across the United States. On August 7, his walk was delayed a few weeks after he was bitten by a rattlesnake in Colorado and airlifted to a local hospital. He finished his walk across America on October 18, 2019.
gYr9 TIL fidgeting (such as tapping your feet or drumming your fingers) can burn up to 350 calories a day and is a common trait of lean/skinny individuals
JYVRV TIL that 1% of the static seen in between changing channels on TV is caused by the light of Big Bang
E0W7 TIL Kim Jong-il, according to North Korean media, didn’t need to urinate or defecate. Just one of many amazing traits he reportedly had.
nel97 TIL That A Young Bill Gates Hacked Into The Schools Scheduling Software To Be Placed In All Girl Classes.