Swearing, cursing, cussing, giving somebody the finger…they’re kind of ubiquitous these days, but they’ve been around for thousands of years. And now researchers say that yelling out your favorite four-letter word can even lower your blood pressure. But where in the &^%* did it all start and how has it evolved?

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The Backstory: The Secret NASA Test That Almost Ended the Space Race
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The Backstory: Space Junk Falling From the Sky
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