Friday, May 29, 2015
Andrew Fraknoi: Exploring the Universe: Mars Rover Sees Rock Spire as It Reaches 4000th Ma...
Andrew Fraknoi: Exploring the Universe: Mars Rover Sees Rock Spire as It Reaches 4000th Ma...: At the end of April, the Opportunity Rover on Mars reached its 4000th martian day of operations! (A day on Mars is 24 hours and 40 minu...
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