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TIL that one of the largest mammals to ever exist was an elephant-sized ground sloth

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WkmoY TIL the Federal Aviation Administration banned “advertising in outer space that is capable of being recognized by a human being on the surface of the Earth without the aid of a telescope or other technological device."
grE57 TIL about a NASA plan to build a giant telescope with a diameter over 1km in one of the craters on the moon.
gg6W TIL that there are fossilized forests with more than 300 ft tall (100 meters) trees in argentina that have been buried in ash for 150 million years
M5Ma TIL of the ADE 651, a fake bomb detector consisting a swivelling antenna mounted via a hinge to a plastic handgrip, requiring no battery, and supposedly charged by the user’s static electricity. It sold for $60,000 until its creator was sentenced to 10 years imprisonment for fraud.
K749 TIL that Mötley Crüe’s rider includes a jar of Grey Poupon mustard. Once, in 1988, frontman Vince Neil found the ‘wrong’ brand of mustard backstage, lost his temper and threw the bottle at the wall. It bounced back and severed an artery in his thumb.