Dr. John Grant, seated right, moderates a discussion with Dr. Jack Mustard, from Brown University, and Dr. Steve Squyres, from Cornell University, seated left, during a Mars Program Update, Thursday, Jan. 13, 2011, at the Smithsonian National Air and Space Museum in Washington. Prominent scientists discussed evidence of water on Mars, current Program status, including the 7th Anniversary of the Mars rovers and the upcoming Mars Science Laboratory mission and previewed exciting discoveries to come. Photo Credit: (NASA/Paul E. Alers)

Dr. Steve Squyres, from Cornell University, left, talks during a panel discussion on the Mars Program, Thursday, Jan. 13, 2011, at the Smithsonian National Air and Space Museum in Washington as Dr. Jack Mustard, from Brown University and Dr. John Grant, moderator, right, look on. Prominent scientists and the head of the Mars Exploration Program gathered at the Smithsonian to discuss evidence of water on Mars; current Program status, including the 7th Anniversary of the Mars rovers and the upcoming Mars Science Laboratory mission also giving previews of the exciting discoveries to come. Photo Credit: (NASA/Paul E. Alers)

Dr. Jack Mustard, from Brown University, talks during a Mars Program Update where prominent scientists discussed evidence of water on Mars, current Program status, including the 7th Anniversary of the Mars rovers and the upcoming Mars Science Laboratory mission and previewing exciting discoveries to come, Thursday, Jan. 13, 2011, at the Smithsonian National Air and Space Museum in Washington. Photo Credit: (NASA/Paul E. Alers)