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Feb 22, 2021 10:31 PM EST New research has shown that contact between dust particles on Mars probably causes electrical discharges analogous to lightning. The sparks, though, are humble relatives of the mighty bolts of Earth and pose no threat to the rovers nor to potential human explorers. (Photo : NASA via Getty Images) Dust Clouds Mars has so many fine dust clouds that almost the entire planet will often be enveloped, disrespectfully interrupting our best views. Scientists have wondered since the days of the first landers, despite the absence of rain clouds, if these particles could move electrons while bumping into each other, creating electric fields large enough to cause powerful discharges. ....