Plutonium powered robot car! With a laser gun! That's (kind of) what's hurtling through space right now as part of NASA Mars Science Laboratory heads for the Red Planet. Hank walks you through this historic mission, with the help of some kick ass animations (thanks NASA!).

Mars Science Laboratory
http://www.nasa.gov/mission_pages/msl/index.html
http://marsprogram.jpl.nasa.gov/msl/

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