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Who is John Carter and what have we learned about Mars in the past century? MSNBC’s Alan Boyle (Cosmic Log) talks with JPL Chief Scientist, Mars Exploration Directorate Dave Beaty. VS Science is produced in cooperation with MICA. Follow @b0yle
Read Alan's pre show interview http://cosmiclog.msnbc.msn.com/_news/2012/03/07/10595325-how-the-hunt-for-mars-life-evolved?lite
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