1. Exobiology Branch, Space Science and Astrobiology Division, NASA Ames Research Center, Bldg N-239 Mail Stop 239-4, Moffett Field, California 94035, United States
2. Blue Marble Space Institute of Science, Seattle, Washington 98154, United States
3. Center for the Emergence of Life, NASA Ames Research Center, Moffett Field, California 94035, United States
4. Astrophysics Branch, Space Science and Astrobiology Division, NASA Ames Research Center, Moffett Field, California 94035, United States
5. Bay Area Environmental Research Institute, Moffett Field, California 94035, United States