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TIL In-N-Out burgers operates occasional pop-up restaurants in Australia for the sole purpose of protecting their tradmark there.

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via reddit.com

kJGW4 TIL "Murphy's Law" originated during rocket sled tests that took place in 1948-49 at Edwards Air Force Base in southern California, and is named after USAF Captain Edward A. Murphy. Murphy went on to make crew escape systems for the F-4, SR-71, B-1 and X-15.
d8jLZ TIL that The Dancing House in Prague, Czech Republic was originally going to be named Fred and Ginger since the building resembles a pair of dancers but the idea was discarded as the architect was "afraid to import American Hollywood kitsch to Prague".
mPxM TIL that Grete Waitz, a middle distance runner, was recruited for the 1978 NYC Marathon to set a fast pace and drop out. She kept running, and won the race, setting a world record. As she neared the finish line, no one knew her name, and many thought she was a man with pigtails.
d8Nm8 TIL a quarter of cowboys were black
x6Oag Til that In engineering, master–slave is a relationship between two systems in which one controls the other. In some cases one master controls just one slave system, but in others there are multiple slave systems controlled by the same master.