directs the Educational Global Climate Modeling Project, which develops, distributes, and supports a fully functional version of the National Aeronautics and Space Administration/Goddard Institute for Space Studies General Circulation Model Model II for use in precollege and university-level science courses. He received his Ph.D. in geological sciences from Columbia University.

Kirk R. Johnson is vice president of Research and Collections and Chief Curator at the Denver Museum of Nature and Science. Dr. Johnson’s research interests span paleobotany, paleoecology, biogeography, geochronology, and biostratigraphy with a particular focus on the Cretaceous to Eocene period. As well as his research publications, Dr. Johnson is the lead author of several popular science books and he has appeared on numerous television programs to popularize geoscience concepts. Dr. Johnson received his Ph.D. in geology and paleobotany from Yale University, and he is a fellow of the Geological Society of America.

Martin J. Kennedy is a professor in the School of Earth and Environmental Sciences at the University of Adelaide, Australia. Previously, he was a professor in the Department of Earth Sciences at the University of California, Riverside, and before then was a senior research geologist at Exxon Production Research Co. His research interests are focused on paleoceanographic and paleoclimate events recorded in the stratigraphic record, using sedimentological and geochemical data integrated with high-resolution sequence and isotope stratigraphic techniques to understand controls of the ancient carbon cycle and biogeochemical feedbacks within the biosphere. Dr. Kennedy received his Ph.D. from the University of Adelaide, Australia.

Dennis V. Kent (NAS) is a professor in the Department of Earth and Planetary Sciences at Rutgers University and an adjunct senior research scientist at Lamont-Doherty Earth Observatory. Dr. Kent’s research interests focus on the use of Cenozoic and Mesozoic magnetostratigraphy and geomagnetic polarity timescales to address geological problems, including paleoclimatology and paleogeography. Dr. Kent is a fellow of the American Association for the Advancement of Science, the American Geophysical Union, and the Geological Society of America. He received his Ph.D. in marine geology and geophysics from Columbia University.

Jeffrey T. Kiehl is a senior scientist in the Climate Change Research Section of the National Center for Atmospheric Research (NCAR) in Boulder, Colorado. Dr. Kiehl’s current research focuses on using climate modeling to understand Earth’s warm greenhouse climates for deep-time periods



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