By Stephanie Pappas
The Earth is a sphere. This is a simple fact that humans have known for thousands of years; it was incontrovertibly confirmed as soon as the Soviet Union launched the Sputnik 1 satellite in 1957 and it went … you know … around the globe.
Nevertheless, a small but vocal group of people who insist that the world is flat — so-called flat-Earthers — have emerged online in recent years, and they seem to be sowing doubt about this most basic aspect of reality. Many flat-Earthers put a great deal of effort into concocting alternative explanations for why the world behaves as if it’s round when it’s actually flat — even though a spherical Earth clearly fits the observations humans have made about the planet over the last few millennia.
However, if Earth, somehow, were truly flat, it would not behave much like the planet we know today. In fact, humanity (and everything else) would be very, very dead.
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