1. SETI Institute, Mountain View, California.
2. University of California Los Angeles, Los Angeles, California.
3. University of California Berkeley, Berkeley, California.
4. Carnegie Institution of Washington, Washington, D.C.
5. British Antarctic Survey, Cambridge, United Kingdom.
6. NASA Goddard Space Flight Center, Greenbelt, Maryland.
7. Pennsylvania State University, University Park, Pennsylvania.
8. Southwest Research Institute, Boulder, Colorado.
9. NASA Ames Research Center, Moffett Field, California.
10. Case Western Reserve University, Cleveland, Ohio.
11. Ecospheres Project, Greenwich, United Kingdom.
12. Georgia State University, Atlanta, Georgia.
13. U.K. Meteorological Office, Reading, United Kingdom.
14. Ball Aerospace & Technologies Corporation,
15. University of Hawaii, Honululu, Hawaii.
16. National Center for Science Education, Oakland, California.
17. Space Telescope Science Institute, Baltimore, Maryland.
18. University of Texas at Austin, Austin, Texas.
19. California Institute of Technology, Pasadena, California.
20. California Academy of Sciences, San Francisco, California.
21. Michigan State University, East Lansing, Michigan.
22. University of Washington, Seattle, Washington.