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Via Wiki Commons/NASA
Something strange is going on, and it seems that nobody has any explanation for it. Incidents of people hearing loud, sometimes earth-shaking, booms have been reported worldwide. In 2017, a total of 64 cases were reported spanning over multiple cities and countries, with the majority of them coming in from the US East Coast. These booms have been recorded in some incidents, and even picked up on seismographs, but experts are still baffled as to what’s causing them.
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