Rapid change in contemporary ice sheets and glaciers pose a major challenge for predicting future sea-level rise, in large part because many key processes operate beyond the range of modern observations. Palaeo glaciology provides critical natural experiments for exploring these processes, yet the palaeo and modern glaciology communities often use different data, modelling approaches, and forums for knowledge exchange. This session aims to bridge that divide by bringing together researchers working on modern and palaeo glaciology to explore shared processes, transferable methods, and common uncertainties. We welcome contributions that integrate geological and geophysical observations, numerical modelling, model-data comparison, and theory across temporal scales. Particular emphasis is placed on insights into marine ice sheet instability, surface mass balance, ice-water interactions, ice stream dynamics, and solid Earth processes. By fostering dialogue across communities, this session seeks to strengthen physically grounded projections of future glacial change.