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TIL that the rediscovery of the Fast Fourier Transform happened after John Tukey attended the Conference of Experts to Study the Possibility of Detecting Violations of a Possible Agreement on the Suspension of Nuclear Tests then begun looking for a reliable way of detecting underground nuclear tests

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WkaBB TIL of Anton's syndrome, a disorder where people believe they can see when in fact, they are cortically blind. They can't be convinced otherwise though and will be very offended if you point their blindness out and start confabulating/making things up when asked what exactly they are seeing.
69PjZ TIL in 1973 two players for the New York Yankees held a press conference to announce they were swapping families with each other (wives, children and their dogs)
woJdW TIL that The Diomede Islands are only 2.4 miles apart but are in different calendar days due to the International Date Line, 21 hours apart. The Big Diomede (part of Russia), is almost a full day ahead of the eastern island, Little Diomede (part of the USA).
KW79 TIL that New York City spent nearly $1 million on typewriters in 2009, mostly for the NYPD, which still used them to fill out property and evidence vouchers, which were printed on carbon-paper forms
PYQMO TIL the birth rate in the U.S. in 2018 fell to the lowest level in 32 years. For perspective, this was lower than in the years after the Great Depression.