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CAPE CANAVERAL, Fla. – NASA’s Kennedy Space Center in Florida is host to a “What Do We Know About Mars” news conference, Nov. 21, as part of preflight activities for the Mars Science Laboratory (MSL) mission. NASA Public Affairs Officer George Diller, at left, moderates the conference featuring Lead Scientist Michael Meyer, Mars Exploration Program; Scientist and Assistant Professor Bethany Ehlmann with the California Institute of Technology and Jet Propulsion Laboratory; and Mars Science Laboratory Project Scientist John Grotzinger from the California Institute of Technology. MSL’s components include a car-sized rover, Curiosity, which has 10 science instruments designed to search for signs of life, including methane, and help determine if the gas is from a biological or geological source. Launch of MSL aboard a United Launch Alliance Atlas V rocket is targeted for Nov. 26 from Space Launch Complex 41 on Cape Canaveral Air Force Station in Florida. For more information, visit http://www.nasa.gov/msl. Photo credit: NASA/Jim Grossmann