1. NASA Goddard Institute for Space Studies, New York, New York.
2. NASA Astrobiology Institute—Virtual Planetary Laboratory.
3. NASA Astrobiology Institute–Virtual Planetary Laboratory.
4. Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, México City, México.
5. Institut d'Astrophysique de Paris, European Space Agency, Paris, France.
6. Departments of Plant Biology and Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois.
7. Department of Biology and Chemistry, Washington University, St. Louis, Missouri.
8. Radio Astronomy Laboratory, University of California, Berkeley, Berkeley, California.
9. Department of Statistics, Rice University, Houston, Texas.
10. NASA Jet Propulsion Laboratory, Pasadena, California.
11. Spitzer Science Center, California Institute of Technology, Pasadena, California.