Are we alone in the solar system? NBCNews.com Science Editor Alan Boyle (Cosmic Log) talks with JPL Chief Scientist, Mars Exploration Directorate Dave Beaty. They continue a conversation begun March 7, 2012. Tweet questions to #askVS
3/7/2012 podcast: Listen at http://www.blogtalkradio.com/virtually-speaking-science/2012/03/08/dave-beaty-alan-boyle-virtually-speaking-science
VS Science is produced in cooperation with MICA. Follow @B0yle @NASAJPL
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