Scientist and Assistant Professor Bethany Ehlmann answers during a What Do We Know About Mars conference.

At NASA’s Kennedy Space Center in Florida, Scientist and Assistant Professor Bethany Ehlmann with the California Institute of Technology and Jet Propulsion Laboratory, answers a question from the media during a “What Do We Know About Mars” news conference, Nov. 21. The press conference was part of preflight activities for the Mars Science Laboratory (MSL) mission. NASA Public Affairs Officer George Diller, at left, moderates the conference that also features Lead Scientist Michael Meyer, Mars Exploration Program 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