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TIL radiation exposures during the Chernobyl disaster were as high as 16 Sv (sieverts), three times the lethal LD50 dose of 4.8 Sv. A human near a breach of the ITER fusion reactor's containment vessel would be exposed to 2000 Sv every second.

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oBPKW TIL diamonds are used as conflict gemstone's because they are much more common than other stones -- not because of their value.
ko7d TIL that in mid-2001, FEMA declared the three likeliest, most catastrophic disasters facing the U.S. to be a hurricane in New Orleans, a massive earthquake in San Francisco, and a terrorist attack in New York City.
VBKvk TIL that happy cake day refers to a person's account anniversary, not their birthday
1aNnO TIL that the 2002 Scooby-Doo movie's initial cut was rated R, and Daphne and Velma's cleavage had to be digitally removed to get it down to a PG rating.
ew8g TIL Earth’s rotation is slowing at a rate of approximately 17 milliseconds a century, and the length of a day for the dinosaurs was closer to 22 hours.