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TIL that Chicago Mayor Anton Cermak died by an assassin's bullet intended for President-elect Franklin D. Roosevelt after a bystander hit the assassin with a purse

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4kobX TIL the wildlife painter John James Audubon ate all of the birds he painted, including bald eagles, snowy owls, sparrows, robins, and whooping cranes
86j8 TIL that during the 1918 flu pandemic, 62 Boston prisoners volunteered to be injected with infected tissue and sprayed with infectious aerosols with a promise of release if they survived. All of the prisoners lived, but the ward doctor died soon after.
5YEjB TIL about Ettore Majorana, a colleague and friend of Fermi, Heisenberg and Bohr among many others, he was considered to be a genius comparable to the greats like Newton and Galilei by most physics of his time, he mysteriously disappeared in 1938 and was never seen again.
XEQ0R TIL that a widow of a civil war veteran died in 2008. She married her husband in 1934 when she was 19 years old and he was 86.
W7L8B TIL that, in 1805, Carl Friedrich Gauss had actually invented Fast Fourier Transform even before Fourier Transform itself but it was forgotten because he didn't publish it. It was re-invented about 160 years later by James Cooley & John Tukey, in a bid to detect nuclear bomb testing underground.