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TIL that of the 48 million Americans with hearing loss, only 1% or 500,000 use sign language

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4X8No TIL The two moons of Mars, Phobos and Deimos, were written about in the book ‘Gulliver’s Travels’ by author Jonathan Swift – 151 years before they were discovered
VB650 TIL a Palestinian killed a democratic US Senator
6E8aw TIL a hologram is a photographic recording of a light field, rather than an image formed by a lens.
neA7 TIL there are truly silent firearms: Russian cartridge design locks propellant gases inside the case. (X-post from r/guns)
5RxR TIL Bryan Kestner, the person who came up with the idea for Planet Hollywood, received only minimal shares for his contribution. He has been asked to not attend functions related to the restaurant. To this day, he has received no money for coming up with the idea.