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TIL that beavers hate the sound of running water so much that they will build dams around speakers that are playing the sound of water running over rocks.

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grOa9 TIL Only 15 of 38 starters finished the men's individual cross country event at the 1924 Summer Olympics due to a difficult course, 40°C weather and noxious fumes emitted from a nearby power plant.
W7JLo TIL that Mae Jemison, the first African-American woman in Space, was so inspired by Nichelle Nichols' portrayal of Lieutenant Uhura on Stark Trek that she began every shift of her 1992 Shuttle mission by radioing "Hailing Frequencies Open" as a tribute to the actress and her character.
yVZ6p TIL the Lincoln Highway (1910s) made driving across America easier. However, muddy or flooded roads were expected and drivers needed camping gear. The road guide included tips for each town. E.g. Fish Springs, Utah travelers could "build a sagebrush fire" for a local team to find/rescue them.
BgQMr TIL that quidditch from Harry Potter has been adapted into a real-life sport, in which the players use brooms, but run instead of flying
eLpD TIL: Claude Shannon know as Father of Information Theory, also founded Digital Circuit Theory which triggered the Digital revolution, but was oblivious to the marvels created because of it as he was suffering from Alzheimer’s Disease.