image: Siberian pine tree with spiral growth growing on the Uurgat Lava field in 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: Scott Nichols/University of Melbourne]