Bernard Hallet is fascinated by the processes that shape alpine and arctic landscapes. The strategy he prefers in his studies of diverse processes is a combination of sound theoretical analysis of the governing physics/chemistry with detailed field or laboratory work. Much of his past and current work is directed at glacial erosion of bedrock, chemical processes active at the glacier bed, till deformation, and a more precise interpretation of the geological record of past ice sheets. More recently he has become interested in developing a sound physical basis for considering some of the textural and distributional properties of till and other glacial sediments. He is a Fellow of the American Geophysical Union.