EVENTS For information on JPL tours and the speakers bureau, visit our PUBLIC SERVICES site. The Solar System Ambassador Program sponsors events in communities around the country. Find out how to become a volunteer Solar System Ambassador.		Topic - Planetary Geology on Mars Spirit and Opportunity: Field Geology on Mars Presented by Dr. Joy Crisp JPL, Mars Exploration Rover Project Scientist RealPlayer (with caption): "Field Geology on Mars" Archived Webcast.   If you don't have RealPlayer, you can download the free RealPlayer 8 Basic. Thursday, May 19 The von Kármán Auditorium at JPL 4800 Oak Grove Drive Pasadena, CA For directions, click here. Friday, May 20 The Vosloh Forum at Pasadena City College 1570 East Colorado Blvd. Pasadena, CA For directions, click here. Both lectures begin at 7 p.m. PST and run for approximately an hour. Admission is free. Seating is limited. For more information, call (818) 354-0112. The Mars Exploration Rover mission landed two rovers on Mars in January 2004. The rovers' primary science objective is to read the record in the rocks and soils in order to search for evidence of past liquid water and to determine whether past environments were favorable for life. The twin rovers - Spirit and Opportunity - have been investigating two different landing sites, resulting in numerous exciting discoveries and providing tantalizing clues about past geologic activity on Mars. This talk will summarize the most important science findings. To learn more about the Mars Exploration Rover Mission click here.