image: Dr. Amy Hessl and Oyunsanaa Byambasuren pour over a map to plan for the exploration and sampling of ancient trees on the Khorgo lava field in central Mongolia. This material relates to a paper that appeared in the 14 March 2018, issue of Science Advances, published by AAAS. The paper, by A.E. Hessl at West Virginia University in Morgantown, W.Va., and colleagues was titled, "Past and future drought in Mongolia." view more
Credit: [Credit: Neil Pederson]