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TIL Human blood has a protein content around 6-8g/100ml, about the same as an average ready-to-drink protein shake

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OoGD1 TIL During the California Gold Rush a Chinese laundry man named John-John washed enough gold dust out of pants cuffs and shirttails of miners to set himself up for life.
GxOj TIL the only way the BBC could record its live broadcasts in the 1950s was to point a film camera at a television. Because of this, the only known recording of the landmark sci-fi serial “The Quatermass Experiment” features an insect walking across the screen.
5V90R TIL the hot springs in Yellowstone National Park are so acidic that they can dissolve a human body within a matter of hours
OoBmX NASA put 12 astronauts on the moon between 1969 and 1972. With the death Friday of Apollo 16’s John Young, only five of those astronauts are still alive, and they range in age from 82 to 87. No human being has been beyond low Earth orbit since the end of the Apollo program.
dlDj TIL the then unknown writer Franz Kafka asked his friend Max Brod to burn all his works after his death. Brod didn’t, published them and Kafka became world famous posthumously.