image: Alan Cooper examining an ancient wolf skull, in Yukon Territory, Canada. This material relates to a paper that appeared in the July 24, 2015, issue of Science, published by AAAS. The paper, by A. Cooper at University of Adelaide in Adelaide, SA, Australia, and colleagues was titled, "Abrupt warming events drove Late Pleistocene Holarctic megafaunal turnover." view more
Credit: [Credit: Photo by Julien Soubrier]