1. Department of Earth Sciences, University of California, Riverside, California.
2. NASA Postdoctoral Program, Universities Space Research Association, Columbia, Maryland.
3. NASA Astrobiology Institute, Virtual Planetary Laboratory Team, Seattle, Washington.
4. NASA Astrobiology Institute, Alternative Earths Team, Riverside, California.
5. Blue Marble Space Institute of Science, Seattle, Washington.
6. NASA Goddard Institute for Space Studies, New York, New York.
7. NASA Ames Research Center, Exobiology Branch, Mountain View, California.
8. Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York.
9. Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, Maryland.
10. Institute of Marine and Environmental Technology, University System of Maryland, Baltimore, Maryland.
11. School of Earth and Space Exploration, Arizona State University, Tempe, Arizona.
12. Planetary Systems Laboratory, NASA Goddard Space Flight Center, Greenbelt, Maryland.
13. School of Molecular Sciences, Arizona State University, Tempe, Arizona.
14. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia.
15. Astronomy Department, University of Washington, Seattle, Washington.
16. University of Edinburgh School of Physics and Astronomy, Edinburgh, United Kingdom.
17. UK Centre for Astrobiology, Edinburgh, United Kingdom.
18. Beyond Center for Fundamental Concepts in Science, Arizona State University, Tempe, Arizona.
19. ASU-Santa Fe Institute Center for Biosocial Complex Systems, Arizona State University, Tempe, Arizona.
20. Institut für Planetenforschung (PF), Deutsches Zentrum für Luft und Raumfahrt (DLR), Berlin, Germany.
21. Carl Sagan Institute, Cornell University, Ithaca, New York.
22. Cornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, New York.
23. Department of Earth and Environmental Sciences, University of St. Andrews, St. Andrews, United Kingdom.
24. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California.
25. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California.