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is a Distinguished Professor of Atmospheric Science at Penn State, with joint appointments in the Department of Geosciences and the Earth and Environmental Systems Institute (EESI). He is also director of the Penn State Earth System Science Center (ESSC). Dr. Mann was a Lead Author on the Observed Climate Variability and Change chapter of the Intergovernmental Panel on Climate Change (IPCC) Third Scientific Assessment Report in 2001 and was organizing committee chair for the National Academy of Sciences Frontiers of Science in 2003. Dr. Mann is the author of more than 200 peer-reviewed and edited publications, numerous op-eds and commentaries, and five books, including Dire Predictions: Understanding Climate Change, The Hockey Stick and the Climate Wars: Dispatches from the Front Lines, The Madhouse Effect: How Climate Change Denial is Threatening our Planet, Destroying Our Politics, and Driving Us Crazy, The Tantrum that Saved the World and The New Climate War: The Fight to Take Back Our Planet.