Donald Savage Headquarters, Washington, DC December 4, 2000 (Phone: 202/358-1727) Mary Hardin Jet Propulsion Laboratory, Pasadena, CA (Phone: 818/354-0344) NOTE TO EDITORS: N00-59 MAJOR MARS DISCOVERY TO BE ANNOUNCED TODAY IN PRESS BRIEFING Imaging scientists Dr. Michael Malin and Dr. Ken Edgett from NASA's Mars Global Surveyor spacecraft will present what they describe as their most significant discovery yet at a press briefing today from 4:00 to 4:45 p.m. EST. The briefing will be held at NASA's Jet Propulsion Laboratory, Pasadena, CA, and broadcast live on NASA Television (NTV). NTV is available on the GE-2 satellite, transponder 9C, at 85 degrees West longitude, frequency 3880.0 MHz, audio 6.8 MHz. Reporters will be able to ask questions if they cover the briefing from participating NASA centers. Participants will be: * Dr. Michael Malin, principal investigator, Mars Orbiter Camera on NASA's Mars Global Surveyor spacecraft, at Malin Space Science Systems (MSSS), San Diego, CA * Dr. Ken Edgett, staff scientist at MSSS * Dr. Jim Garvin, Mars Exploration Program Scientist at NASA Headquarters. Images will be available at the time of the briefing on the Internet at: http://mars.jpl.nasa.gov/mgs - end -