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  • Talk Box: Mars Rover Opportunity's Big Milestoneadd to reading list  

    Posted on July 29, 2014 at 7:41 PM

    Theoretical Astrophysicist Ethan Siegel joins us to talk about the record broken by NASA's Opportunity Rover on Mars. He also has a look ahead to next month's Perseid meteor shower.

    By Ben Lacy