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TIL nearly 6% of Americans are millionaires. Many live near what have been called ‘wealth-building engines,’ places that have technology, finance and defense. Not one area in the middle of the country make the list.

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jNZbj TIL the F-82 "Twin Mustang" fighter plane, designed to escort bombers thousands of miles to Tokyo, was literally two P-51 Mustangs joined at the wing. Both cockpits were fully functional, so one pilot could sleep while the other flew the plane on missions that could last up to 12 hours.
0w7Vv TIL The famous Gauss electric flux theorem was modified in 2011 to include the charge on the Gaussian surface. It is now called Generalized Gauss's Theorem
a800J TIL a 2010 review of published cases stated "Numerous deaths have occurred after chiropractic manipulations. The risks of this treatment by far outweigh its benefit."
gX9L TIL that there is a Heavy Equipment Playground in Vegas that allows people to “play” with heavy machinery.
MeM6W TIL that in Detroit, you can head south and get to Canada.