We study the dynamics of mountain glaciers to continental-scale ice sheets as a function of time using glacial sediments as archives of past glacial conditions. Our tools are sediment drill cores, seismic imaging, and seafloor bathymetry. Our particular focus is the Antarctic ice sheet, conducting oceanographic expeditions almost every other year for the last several decades. We also study the composition of the ancient atmosphere using gas bubbles preserved in ice cores. History of Antarctic glaciationAncient atmospheric chemistry and physics (ice cores)Department of Earth, Environmental and Planetary Sciences6100 Main StreetHouston, TX 77005 USA