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TIL that a dry seasonal riverbed can be called a wadi

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WkMKd TIL of the Invention Secrecy Act. The government has a program in place which specifically deals with inventions that are deemed to be "threats to national security" (open thread for choice quotes). There are currently 6102 inventions under lock and key, some of which "pertain to energy generation".
Yp8dG TIL after a British bicycle rental learned that the band Queen used their bikes for a music video that involved the bicycles being ridden by naked women, the band had to buy the bicycle seats.
R5xP7 TIL the last time new soap opera created in American television was Passion in 1999. Soap opera have been declining ever since.
Z8A6Y TIL that plankton produces 50-85% of the worlds oxygen.
YppP7 TIL the movie "An Alan Smithee Film: Burn Hollywood Burn" was a satire of movies which are so bad that the director refuses credit and uses the pseudonym "Alan Smithee". The real-life director of the movie was so unhappy with it that he took his name off and it became a real Alan Smithee film.