Douglas S. Robertson was an adjunct professor in Geological Sciences and is an Emeritus Fellow of the Cooperative Institute for Research in Environmental Sciences at the University of Colorado. He is an author or co-author of 96 refereed publications including 9 in Science, 5 in Nature, and one in Scientific American. His published articles range from geophysics to astronomy, physics, mathematics, theoretical biology, paleontology and philosophy of science. He has written two books, published by Oxford University Press, on applications of quantitative information theory to a variety of problems in philosophy. He is retired from the Geosciences Research Division of NOAA.