image: Kistler preparing ancient DNA samples for analysis at the University of Warwick in 2016. This material relates to a paper that appeared in the 14 Dec. issue of Science, published by AAAS. The paper, by L. Kistler at Smithsonian Institution in Washington, DC, and colleagues was titled, "Multiproxy evidence highlights a complex evolutionary legacy of maize in South America." view more
Credit: [Credit: Shahidul Alam, Drik Picture Library]