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TIL Reykjavik’s City Council decided to turn off city lights in order to allow residents to enjoy a fantastic Northern Lights display without artificial light pollution.

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AGL7 TIL In 526 there was a worldwide dust cloud that blocked out the sun for an entire year. It resulted in widespread famine and disease. More than 80% of Scandinavia and China starved to death, 30% of Europe died and empires fell. The cause is unknown.
Oo8Ge TIL During WW2 air support had been requested against a German occupied city. By then, the British took the city but were unable to radio the RAF to stop the bombing, so a pigeon named G.I. Joe was sent to stop it, arriving just as the planes were preparing to take off, saving thousands of men.
9YDLX TIL: That orange-fleshed sweetpotato is good for healthy babies
KORY6 TIL a teacher has kept the "World's Oldest Twinkie" under glass since 1976
N7W96 TIL of Aeroplankton, the atmospheric analogue to oceanic plankton that deposit many millions of airborne viruses and bacteria every day on every square meter around the planet.