Chemical, physical, biotic, and human processes constantly reshape Earth's surface from particles to continents. These processes form a complex network of interactions and feedbacks, but these interplays are not well understood, and challenging questions face science and society: How did Earth surface processes interact to create the landscapes of today? How will changing processes shape Earth's surface in coming years? In this new video, Dr. Dorothy Merritts describes the research agenda laid out in the recent National Research Council report Landscapes on the Edge: New Horizons for Research on Earth's Surface.