The Betty J. Meggers and Clifford Evans Papers document their research and professional activities from 1946-2012 and primarily deal with their archaeological and anthropological research in South America. Their work at the Smithsonian National Museum of Natural History and their frequent collaboration with other researchers and professional organizations is also represented. In addition, this collection contains detailed records on South American research conducted by the Smithsonian Institution from the 1950s through the 2010s. The collection consists of research and project files, raw data and analysis, graphs and illustrations, photographs, correspondence, maps and charts, and administrative files.