Researchers spot giant crater they say could be ‘Red Planet’s Yellowstone’

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LONDON: European Space Agency scientists say they have identified what is probably an ancient Mars supervolcano, whose crater measures 40km by 30km and dips as low as 1,750 metres at its deepest point – the Red Planet’s equivalent of Earth’s Yellowstone Caldera, they say.
At first glance, the Mars Express image looks to be pockmarked with a several impact craters. However, the largest structure among them is probably the remains of an ancient supervolcano.
The images released by the European Space Agency (ESA) were taken on 26 November, 2014, by the high-resolution stereo camera on Mars Express, ESA’s first mission to explore the Red Planet. The images focus on the Sileo Patera feature in the Arabia Terra region of Mars.