A KEY RETURNED SAMPLE SCIENCE OBJECTIVE AS DESCRIBED BY THE RECENT INTERNATIONAL MSR OBJECTIVES AND SAMPLES TEAM (IMOST) REPORT IS OBJ. 1 INTERPRET THE PRIMARY GEOLOGIC PROCESSES AND HISTORY THAT FORMED THE MARTIAN GEOLOGIC RECORD WITH AN EMPHASIS ON THE ROLE OF WATER . MY RESEARCH FOCUSES ON HOW WATER/ROCK REACTION MIGHT SUPPORT LIFE ON EARTH AND OTHER PLANETS. AS A CO-INVESTIGATOR OF THE ROCK POWERED LIFE NAI I CHARACTERIZE THE MULTIPLE EPISODES OF WATER/ROCK REACTIONS RECORDED IN SEAFLOOR AND OPHIOLITIC SERPENTINITES EXPERTISE THAT IS DIRECTLY RELEVANT TO THE OBJECTIVES OF THE MARS RETURNED SAMPLE SCIENCE PARTICIPATING SCIENTIST PROGRAM AND INFORMS MY PERSPECTIVE ON IDENTIFYING ARTICULATING AND PRIORITIZING SCIENTIFIC QUESTIONS RELEVANT TO MARS SAMPLE RETURN AN EXERCISE I HAVE ENGAGED IN AS A MEMBER OF IMOST.