There’s a Strange Cloud on Mars Right Now, and It’s Just Hanging Around — For more than a month now, a European orbiter circling Mars has 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 just a coincidence, the agency adds. No volcanic process is producing the cloud — the volcano hasn’t been active in about 50 million years…at: https://www.space.com/42257-strange-mars-cloud-on-mars-phot…