Department of Earth, Atm., and Planetary Sci., Massachusetts Institute of Technology, Cambridge, MA 02142 United States
Department of Earth, Atm., and Planetary Sci., Massachusetts Institute of Technology, Cambridge, MA 02142 United States
School of Earth and Sp. Expl., Arizona State University, Tempe, AZ 85287 United States ; Department of Chem/Biochemistry, Arizona State University, Tempe, AZ 85287 United States
Microbial Sys. Div., Lawrence Livermore NL, Livermore, CA 94550 United States
Department of Earth and Planetary Sci., Washington University, St. Louis, MO 63130 United States
School of Earth and Sp. Expl., Arizona State University, Tempe, AZ 85287 United States
Department of Earth, Atm., and Planetary Sci., Massachusetts Institute of Technology, Cambridge, MA 02142 United States