For more than a month now, a European orbiter circling Marshas…

For more than a month now, a European orbiter circling Marshas been watching a long, plume-like cloud on the Red Planet. The cloud has remained in place over a mountain called Arsia Mons near the Martian equator since Sept. 13, according to a statement released by the European Space Agency (ESA). But that location is … Read moreFor more than a month now, a European orbiter circling Marshas…