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TIL that Eli Whitney’s cotton gin is short for “cotton engine”.
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TIL if microwaves had clear glass windows you would be exposed to the harmful microwaves they emit. The metal mesh screen over the windows have large enough holes for our eyes to see inside, but small enough to block the harmful microwaves that would otherwise be emitted.
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TIL that Sigmund Freud's theories inadvertently sparked a revolution in psychology; his ideas were seen (in many cases) as extremely outlandish and wrong, sparking a lot of psychologists to seek to prove them incorrect and revitalizing the field as a whole.
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TIL that old Celtic, English, and Germanic folk would participate in an event called “flyting”: where two people would poetically throw insults and crude humor at each other in a duel of dictionary skill; it was essentially the earliest form of rap battling
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TIL that NBC, Fox, and ABC, who are seemingly TV rivals, are also co-owners of Hulu. 30% each, plus 10% owned by TBS.
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TIL The Japanese Spider Crab can weigh 40lbs and live for 100 years. It has a leg span of 13 feet.