Dr. Mosley-Thompson, Professor of Geography, and Research Scientist at the Byrd Polar Center of The Ohio State University, visited the department for two days in March 2007 as our Hammond Lecturer. Her public lecture, “Abrupt Climate Change: Past, Present, and Future,” superbly illustrated the process of obtaining high resolution proxy records of climate from ice cores and discussed current knowledge of climate change based on ice core records. She drew many examples from her own research on Greenland ice. As is customary for Hammond lecturers, she also held an informal seminar the following morning. Ed and Elizabeth Hammond were not able to attend, but still reside in Knoxville. Dr. Mosley-Thompson’s visit was supported by the Ed and Elizabeth Hammond Lecture Fund, which they initiated at the time of Ed’s retirement in 1987 and to which they have generously contributed.