1. School of Earth & Environmental Sciences University of St Andrews St Andrews UK
2. Virtual Planetary Laboratory NASA Astrobiology Institute University of Washington Seattle WA USA
3. Department of Earth & Space Sciences University of Washington Seattle WA USA
4. Department of Biology Carleton College Northfield MN USA
5. School of Oceanography University of Washington Seattle WA USA
6. Department of Geology and Geophysics Yale University New Haven CT USA
7. Department of Earth Sciences University of California Riverside CA USA