Professor Robin J. H. Clark, FRS has pioneered the application of Raman spectroscopy for use in the identification of pigments in historical artifacts. He is a Royal Society of Chemistry Liversidge lecturer at University College, London.
Kenneth M. Towe was a Research Geologist in the Department of Paleobiology at the Smithsonian Institution's National Museum of Natural History. His research interests include the mineralogy of clays, and the environmental and evolutionary history of early life on Earth. He retired as Senior Scientist in 1996.