1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA.
2. NASA Headquarters, Washington, DC, USA.
3. NASA Ames Research Center, Moffett Field, California, USA.
4. Blue Marble Space Institute of Science, Seattle, Washington, USA.
5. Georgetown University, Washington, DC, USA.
6. NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.
7. Department of Microbiology and Immunology, Institute of Marine and Environmental Technology, University of Maryland School of Medicine, Baltimore, Maryland, USA.
8. Santa Fe Institute, Santa Fe, New Mexico, USA.
9. Los Alamos National Laboratory, Los Alamos, New Mexico, USA.
10. University of Florida/Space Life Sciences Laboratory, Kennedy Space Center, Florida, USA.
11. Brown University, Providence, Rhode Island, USA.
12. Planetary Science Institute, Tucson, Arizona, USA.
13. Pennsylvania State University, Altoona, Pennsylvania, USA.
14. Westminster College, Salt Lake City, Utah, USA.
15. NASA Johnson Space Center, Houston, Texas, USA.
16. Foundation for Applied Molecular Evolution, Alachua, Florida, USA.
17. Universidad Nacional Autonoma de Mexico, Coyoacan, Distrito Federal Mexico, Mexico.
18. NASA Astrobiology Institute, NASA Ames Research Center, Moffett Field, California, USA.
19. Denver Museum of Nature and Science, Denver, Colorado, USA.
20. Space Science Institute, Littleton, Colorado, USA.
21. University of Minnesota, Minneapolis, Minnesota, USA.
22. University of New Mexico, Albuquerque, New Mexico, USA.
23. Princeton University, Princeton, New Jersey, USA.
24. Texas Tech University, Lubbock, Texas, USA.
25. New Mexico Institute of Mining and Technology, Socorro, New Mexico, USA.
26. Northern Arizona University, Flagstaff, Arizona, USA.
27. College of Charleston, Charleston, South Carolina, USA.
28. University of Maryland Baltimore County, Baltimore, Maryland, USA.
29. Lunar and Planetary Institute/USRA, Houston, Texas, USA.
30. California State University Northridge, Northridge, California, USA.
31. McGill University, Montreal, Quebec, Canada.
32. Valparaiso University, Valparaiso, Indiana, USA.
33. Ecole Normale Superieure, Paris, France.
34. Wichita State University, Wichita, Kansas, USA.
35. Technische Universität Berlin, Berlin, Germany; GFZ German Research Center for Geosciences, Section Geomicrobiology, Potsdam, Germany; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Department of Experimental Limnology, Stechlin, Germany.
36. Michigan State University, East Lansing, Michigan, USA.
37. Delaware State University, Dover, Delaware, USA.
38. University of Florida, Gainesville, Florida, USA.
39. University of Texas, El Paso, Texas, USA.