TEMPE, ARIZONA—Arizona State University archaeologist Christopher Morehart has partnered with researchers in the U.S. and Mexico to survey, map, and excavate archaeological sites over a large area to study how changes in climate and political structure affect how people interact with the environment. “Understanding what affects people more, shifts in the natural or in the political environment, is critical to understanding how we adapt and respond to change. To study these questions requires a long-term perspective and a large study area. We are working in the lands of four municipalities in the Basin of Mexico, making this project the largest regional survey and excavation project in this area in decades,” Morehart said in a press release. “This is a pressing concern today since the stability of political and institutional relationships directly impacts the sustainability of social and ecological relationships and human livelihoods,” he explained. To read in-depth about archaeology in the region, go to "Under Mexico City."