DustStorms
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Dust storms may have stolen all of Mars' water
In May 2018, Opportunity had been doing science on Mars since 2004, and there was no reason to think that the plucky rover wouldn't carry on. Then, a dust storm hit that completely obscured the planet from view. After fine dust coated Opportunity's solar panels, the rover apparently lost power and was declared dead by NASA in February 2019. Now, scientists think similar storms may have also delivered a coup de grace to water on Mars, stripping it from its surface for good.
