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TIL nuclear weapons testing artificially altered the proportion of the carbon isotopes in the atmosphere, making radiocarbon dating after 1945 likely to be unreliable.

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pmgN TIL unless it’s brewed through a paper filter, coffee can significantly raise cholesterol.
7r4yX TIL Beaufort's Dyke is a deep sea trench off the coast of Northern Ireland that the British have used to dump thousands of tonnes of munitions and nuclear waste. There are explosions happening down there that register on seismographs.
Y7J6r TIL on November 23, 1963, former Vice President Richard Nixon wrote a condolence letter to Jackie Kennedy. On January 21, 1964, Mrs. Kennedy sent a thank you note to Nixon, encouraging him to run for the presidency again, as he had lost to Kennedy in 1960.
66Vl TIL The inventor of laughing gas became addicted to chloroform and one day, delirious, rushed out into the street and threw sulfuric acid on people. When his mind cleared and he realized what he had done, he killed himself, blotting out the pain with chloroform.
R5VV7 TIL Why You Should Stop Rinsing Your Mouth After Brushing