It's avalanche season on Mars, when the spring Sun defrosts dry ice near the north pole and sends rocks tumbling down steep cliffs. https://t.co/5CgO2gO3e5 pic.twitter.com/wUxTTNoaQd
— Corey S. Powell (@coreyspowell) September 4, 2019
via Twitter https://twitter.com/coreyspowell
September 04, 2019 at 06:19AM
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