1. Centro de Astrobiología (CAB), CSIC-INTA, 28850 Torrejón de Ardoz, Madrid, Spain
2. PhD Program in Space Research and Astrobiology, University of Alcalá (UAH), 28805 Alcalá de Henares, Madrid, Spain
3. Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences (SLU), 75651 Uppsala, Sweden
4. Departamento de Química Física, Facultad de Ciencias, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, 18071 Granada, Spain
5. Carl Sagan Center for the Study of Life in the Universe, SETI Institute, Mountain View, California 94043, United States