Paul R. Epstein, MD, MPH, (1943 2011) was Associate Director of the Center for Health and Global Environment at Harvard Medical School and a medical doctor trained in tropical health. He contributed to the work of the Intergovernmental Panel on Climate Change, which was awarded the Nobel Peace Prize in 2007. Dan Ferber is a contributing correspondent for "Science" magazine. His feature articles have appeared in many publications, including "Popular Science, Audubon, "and "Nature Conservancy".