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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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5Y9kr TIL flashing a light at the right frequency temporarily cleared up plaque of peptide amyloid-β in the brains of mice. This plaque build up is characteristic of Alzheimer's disease and clearing it temporarily suppressed its symptoms in the mice
GRKJ TIL that cows have “best friends” and get stressed when separated
OLvY TIL that, according to Article VIII of the Outer Space Treaty of 1967, you can be arrested for a crime committed anywhere in the known universe
16J04 TIL That there are clay pipes that wash up in The Thames, having been used for centuries as disposable, short-term pipes. They went out of favor with the rise of cigarettes.
VBVKD TIL the domestic dog breed with the strongest bite force is the Anatolian Shepherd Dog at 743 psi. Followed by the Cane Corso at 700 psi.