Affiliation: | 1. Space Science Division, NASA Ames Research Center, MS 245-3, Moffett Field, CA 94035, USA;2. Dept. Earth and Space Sciences/Astrobiology Program, Box 351310, University of Washington, Seattle, WA 98195, USA;3. University of St. Andrews, Fife, Scotland KY16 8YH, UK;4. Blue Marble Space Institute of Science, Seattle, WA, USA |