Once-active “supervolcanoes” in northern Mars likely spewed ash and dust thousands of miles away, producing powdery deposits noticed by the NASA’s Curiosity and Opportunity rovers closer to the equator, a new study suggests. The scientists suspect that irregularly shaped craters in Arabia Terra, which is in the northern highlands of Mars, are leftovers of huge volcanoes … Continue reading "Ancient ‘Supervolcanoes’ Lurk On Mars And Once Showered Planet In Ash: Study"