Mars Exploration Rovers Update: Opportunity Wraps Science in Marathon Valley https://t.co/B14IeEK5k3 http://pic.twitter.com/xZnyL2YyhR
— Emily Lakdawalla (@elakdawalla) September 5, 2016
via Twitter https://twitter.com/elakdawalla
September 05, 2016 at 09:59PM
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