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Mars volcano

The expansive crater located in the center of the volcano resulted from the loss of supportive magma that the mountain spewed billions of years ago. With the interior of the volcano lost, its roof caved in, forming the giant hole we see today. Image Credit: ESA/DLR/FU Berlin (G. Neukum). Photo courtesy of Tecca

Mars volcano

The European Space Agency recently released stunning images of one of the planet's most striking features: the Tharsis Tholus volcano.