Dwayne Brown, NASA senior public affairs officer,, left, John Grunsfeld, astronaut and associate administrator for the NASA Scie


Dwayne Brown, NASA senior public affairs officer,, left, John Grunsfeld, astronaut and associate administrator for the NASA Science Mission Directorate, William Gerstenmaier, associate administrator for the NASA Human Exploration and Operations Directorate, Michael Meyer, lead scientist, Mars Exploration Program, and Ellen Stofan, NASA chief scientist, are seen at a press briefing where it was announced what instruments will be carried aboard the agency’s Mars 2020 mission, Thursday, July 31, 2014 at NASA Headquarters in Washington. The new rover will carry more sophisticated, upgraded hardware and new instruments to conduct geological assessments of the rover's landing site, determine the potential habitability of the current environment, and directly search for signs of ancient Martian life -- something no previous Mars mission has done


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