NASA’s Mars Global Survey orbiter has observed some interesting changes at Mars. Researchers will announce and discuss the discoveries at a listen-and-logon news briefing at 1 p.m. EDT Tuesday, Sept. 20.

Participants:

— Dr. Michael Meyer, Mars Exploration Program chief scientist, NASA Science Mission Directorate, Washington

— Dr. Michael Malin, principal investigator for the Mars Orbiter Camera on NASA’s Mars Global Surveyor, Malin Space Science Systems, San Diego, Calif.

— Dr. Jack Mustard, Associate Professor of Geological Sciences, Brown University, Providence, R.I.

Reporters should call the Media Relations Office at NASA’s Jet Propulsion Laboratory, Pasadena, Calif., at 818/354-5011, for participation information. Images and graphics supporting the briefing will be posted online at the start of the briefing at:

http://www.jpl.nasa.gov/media/mgs-sept05/

For more information about NASA and agency programs on the Internet, visit:

http://www.nasa.gov/home