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TIL Olbers's paradox: for centuries there was no widely-accepted explanation for why the night sky is dark (if the universe is infinite, eternal, and/or static, the night sky shouldn't be dark)

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4WxX TIL John Lennon’s lost guitar was bought in a music shop in the late 60s. Forty years later, the owner discovered it belonged to Lennon after reading a magazine article, and then the guitar sold for $2.4 million in 2015.
kOXW1 TIL 19th century England was swept by "Egyptomania", a renewed interest in Egypt's past. Rich Victorians would travel to Egypt and bring back ancient mummies with which they would hold "mummy unwrapping parties" for their friends.
d8Y1Z TIL the line of descending numbers on the copyright page of a book is called the Printer's Key, and it indicates which printing of the book it is.
QJ0ea TIL Steller's Sea Cow was wiped out by hunting in less than 30 years since discovered...
6ZW8 TIL candy pumpkins were placed on the seat of every U.S. Senator by the candy industry in 1985 in hopes of extending U.S. daylight saving time to cover Halloween.