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TIL the NASA cameras that tracked Apollo rockets were built off of M-45 quadmount anti-aircraft gun systems

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BrNOk TIL humans can gain the ability to see ultraviolet light. We simply have a layer in our eyes which filters it out. Individuals who suffered eye damage from disease, injury or surgery have sometimes gained the ability to distinguish ultraviolet light.
neReo TIL Samuel Clemens (AKA Mark Twain), who was born 186 years ago on November 30th, was born two months early and was not expected to live. He ended up being one of three children in his family who survived to adulthood while four other of his siblings passed away.
b9d9a TIL that the Italian-American Civil Rights League was founded by the mafia to improve the image of mobsters. They forced the producer of the The Godfather to remove all references to the word 'mafia' from the screenplay even though the novel repeatedly uses the word.
wol16 TIL the USS Scorpion was lost at sea in May 1968 with 99 men lost. The wreckage was found almost two miles deep, making it impossible to determine the cause of accident. Underwater acoustics out of the Canary Islands heard the exact time of the implosion but were unaware it was the sub sinking.
Me9Xm TIL that Groucho Marx and T.S.Eliot were fond penpals but hadn't met because life got in the way. When they did at last meet for dinner at Eliot's house, it didn't go well. All that Groucho wanted to talk about was Shakespeare and The Wasteland. But T.S. Eliot wanted to hear about Duck Soup.