Analysis by Alejandro Estrada and Paul A. Garber. (This article originally appeared at Mongabay.com on 29 December 2019. Republished here under Creative Commons license, CC BY-ND 4.0) Alejandro Estrada of the Institute of Biology at the National Autonomous University of Mexico and Paul A. Garber of the Department of Anthropology at the University of Illinois-Urbana […]
