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TIL China's rival to Starlink is called SkyNet, the same name of the Terminator's franchise AI system that conquered the world.

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YpbKW TIL: Workers constructing a then-secret bomb/fallout shelter in Budapest meant to protect the leadership were told the project was actually a subway station. The Rákosi-bunker (AKA F-4 Object) was active from the 1950s to the 70s. Few in the public knew of it until a documentary appeared in 1994.
LBv9 TIL as late as 17th-Century Europe, masturbation was commonly employed by nannies to put their young male charges to sleep.
Lkd9Q TIL of hidden mother photography, which was a result from the long exposure time needed for early photographs
69r9Z TIL there is a golf course situated between the two runways at the Don Mueang International Airport in Bangkok. The course is owned by the Royal Thai Airforce, however it is open to the public as long as golfers clear airport security.
69YLW TIL that the French had for the best part of 5 centuries a very lucrative salt tax. So much so that at some point it was as valuable to France, as the American silver mines were to Spain (according to Cardinal Richelieu)