http://bigthink.com/big-think-tv/what-if-everyone-on-earth-jumped-at-the-same-time
Here we have an article from Big Think with a link to a video from VSauce, a YouTube channel other STACies have recommended to me in the past. Small world, no? The video and short article accompanying it entail what might possibly happen if every human being on earth jumped at once in close proximity to one another. Now at first, it seems like an impossibility. "There's seven billion people in the world," you're probably thinking. "What sort of place could we pack them all into?" Well, as the video explains, if the world's population density was equal to Manhattan's, we could fit the whole of the human race into the state of Texas with room to spare. If we were packed together shoulder-to-shoulder, our species would fit in the city limits of Los Angeles. But still, as the video points out, that's nothing compared to the earth's mass, and nothing like the earth being thrown out of orbit and into the sun would happen. But on earth itself, there would be some impact. And if it's true that the BBC did get enough people to create some seismic activity (I can't find any other source in favor of this), there's something to this theory. But at the end of the day, there's no real weight to this idea: there simply are not enough people in the world to create anything more than a minor earthquake. Perhaps proponents of this idea should wait a few more decades - certainly there will be a better chance of this happening when our planet's population hits the ten billion mark.
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