NASA's Mars Exploration Rovers were designed to last 90 days on the red planet. But as of this week, both of the 384-pound rovers -- Spirit and Opportunity -- have lasted four years past their expected life, Florida Today says this morning. Graphic by Dennis Lowe, Today.Cutlines Only showcases Gannett website art. E-mail suggested links here; see Tipsters Anonymous Policy in the green sidebar, upper right. Or leave a note in the comments section, below.
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