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TIL about ghost bikes, which are bicycles painted white, used to symbolize where a cyclist was killed

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N7RYQ TIL that when he was 8, George Carlin's aunt worked for the publisher of the Sunday newspaper funnies. Through his aunt, Carlin gained early access to the comics and would impress his classmates by predicting each weeks stories.
4kaao TIL the air force has a program in place that will keep B-52 bombers flying for over a hundred years since they were manufactured
wLxQ8 TIL if you stand on Mercury, experiencing a day, from sunrise to sunrise, will take two full orbits around the sun, and three full rotations of the planet.
b9wpp TIL about the practice of widow's succession. This was a practice used by several countries in the early 20th century were if a politician died in office they would be succeeded by their widow. The practice resulted in some of the earliest women to hold political office in modern times.
OGDkX TIL about Mark Zborowski, an NKVD agent who infiltrated Trotsky's organization in Paris, murdered Trotsky's son, moved to the US where he continued to infiltrate Trotsky's organization. He joined Harvard as a researcher, was later tried and convicted as a spy, and then resumed his academic career.