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TIL Tucson is the longest continuously inhabited region in the US stretching back for at least 4,000 years

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l7jZa TIL A re-edit of the pilot episode of Battlestar Galactica was released theatrically in 1978 in Canada before the television series aired in the United States, in order to help recoup its high production costs.
QJA0d TIL of Continuum, a magazine devoted to proving HIV/AIDS is hoax. It ceased publishing after all of its core members died of HIV complications.
oY97 TIL The Rolls Royce Merlin V12 aviation engine created so much thrust from the exhaust, engineers were able to angle the exhaust backwards to gain 10 mph in the Spitfire it powered.
grDE8 TIL that astronauts can't cry properly in space - In microgravity, tears don't fall as they do on Earth. Instead, they form a ball on the eye, which can cause discomfort.
KOLPJ TIL Almost all major toothpaste brands contain Sodium Lauryl Sulfate, an inexpensive foaming agent that is a known cause of mouth ulcers.