1. Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA
2. Blue Marble Space Institute of Science, Seattle, Washington, USA
3. Department of Biology, University of Utah, Salt Lake City, Utah, USA
4. Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
5. Department of Earth and Environmental Sciences, Michigan State University, East Lansing, Michigan, USA
6. Space Sciences Division, NASA Ames Research Center, Mountain View, California, USA
7. Department of Geosciences, University of Rhode Island, Kingston, Rhode Island, USA
8. Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, USA