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TIL Casper manipulated online mattress reviews to boost sales

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kJ5XE TIL of the Apollo 15 postal covers scandal. The astronauts of Apollo 15 carried about 400 unauthorized postal covers into space and to the Moon's surface on the Lunar Module Falcon. All three were paid/bribed $7k each by stamp dealers, got busted, and never flew in space again.
a8WJ0 TIL: Meowing is an interesting vocalization in that adult cats don't actually meow at each other, just at people. Kittens meow to let their mother know they're cold or hungry, but once they get a bit older, cats no longer meow to other cats.
QPRX TIL When told the reason for daylight saving time a Native American said, “Only a white man would believe that you could cut a foot off the top of a blanket and sew it to the bottom of a blanket and have a longer blanket.”
R5Rr8 TIL the widely reported mass hysteria ensuing from 1973's The Exorcist is often exaggerated. Many instances of viewers fainting or leaving the cinema were not from the more gruesome possession scenes, but from an earlier medically-accurate scene where Regan gets blood drawn from her neck.
MeJMm TIL The Silk Road was often used for slave trade