1. Astrobiology Group, Center for Astronomy and Astrophysics, Technische Universität Berlin, Berlin, Germany.
2. GFZ German Research Center for Geosciences, Section Geomicrobiology, Potsdam, Germany.
3. Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Department of Experimental Limnology, Stechlin, Germany.
4. School of the Environment, Washington State University, Pullman, Washington, USA.
5. Max Planck Institute for Solar System Research, Göttingen, Germany.
6. Institute for Astrophysics, Georg-August University, Göttingen, Germany.
7. Department of Astrophysics and Planetary Science, Villanova University, Villanova, Pennsylvania, USA.