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TIL that NASA was concerned that the crew of Apollo 10 would attempt to land on the moon, so they intentionally defueled their LEM so they would be stranded permanently if they did land

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rRyv0 TIL that a year is a leap year not only if it's divisible by 4 -- it also has to be divisible by 400 if it's a century year.
neXN9 TIL that despite ancient Roman bridges being the first large and lasting bridges ever built, many are still used despite being around 2,000 years old.
kJlLd TIL of the given name "Increase." It is the English language literal translation of the name Joseph. Since the 19th century, the name has decreased in popularity and is now rare, if not extinct.
Z8KQG TIL Walt Disney's younger sister Ruth lived to age 92. Ruth was very shy and private, giving less than a half dozen interviews over the decades. Walt would send an annual December birthday letter to Ruth, accompanied by a check along with a selection of Disney-related merchandise for her son
ADY9B TIL That the world's foremost expert on Sherlock Holmes, Richard Lancelyn Green, was found dead in his flat in 2004 in very mysterious circumstances. Green at the time of death was attempting to stop a Christies auction of Holmes artefacts from taking place and ending up in collectors hands.