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TIL Conrad Heyer is the earliest-born person of whom a photograph is known to exist. He fought for the Continental Army under the command of George Washington and participated in Washington’s famous crossing of the Delaware in December 1776. In 1852, aged 103, he posed for this daguerreotype.

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DoAP TIL in the Middle Ages and Renaissance, the color of clothing showed a person’s social rank and profession. Red could only be worn by the nobility, brown and gray by peasants, and green by merchants, bankers and the gentry and their families
Vgom TIL that Vatican state owns a observatory telescope in south-west Arizona
wolL8 TIL the Picturephone, the first two way video communication device, was debuted in 1964 by Bell Labs. The device was withdrawn from the market in the early 70s as a commercial failure.
VaXQ TIL During filming of Return of The Jedi, Carrie Fisher would get concerned for the 11 y/o. actor who played Wicket. She fed him milk and cookies in between takes to make sure he wasn’t getting overheated.
Jvo4 TIL astronauts have a patch of Velcro inside their helmet so they can scratch their nose.