1. Department of Earth Sciences, The Natural History Museum, London, United Kingdom.
2. Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Bologna, Bologna, Italy.
3. NASA Jet Propulsion Laboratory, Pasadena, California, USA.
4. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA.
5. Photon Systems Inc., Covina, California, USA.
6. Plancius Research, Severna Park, Maryland, USA.
7. Department of Astronomy, University of Maryland, College Park, Maryland, USA.
8. Planetary Geology, Geophysics and Geochemistry Lab, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.
9. Department of Geology, University of Johannesburg, Johannesburg, South Africa.
10. School of Geographical and Earth Sciences, University of Glasgow, Glasgow, United Kingdom.