<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Mercader, Julio</style></author><author><style face="normal" font="default" size="100%">Barton, Huw</style></author><author><style face="normal" font="default" size="100%">Gillespie, Jason</style></author><author><style face="normal" font="default" size="100%">Harris, Jack</style></author><author><style face="normal" font="default" size="100%">Kuhn, Steven</style></author><author><style face="normal" font="default" size="100%">Tyler, Robert</style></author><author><style face="normal" font="default" size="100%">Boesch, Christophe</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">4,300-year-old chimpanzee sites and the origins of percussive stone technology.</style></title><secondary-title><style face="normal" font="default" size="100%">Proc Natl Acad Sci U S A</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Proc. Natl. Acad. Sci. U.S.A.</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Animals</style></keyword><keyword><style  face="normal" font="default" size="100%">Anthropology</style></keyword><keyword><style  face="normal" font="default" size="100%">Behavior, Animal</style></keyword><keyword><style  face="normal" font="default" size="100%">Cote d&#039;Ivoire</style></keyword><keyword><style  face="normal" font="default" size="100%">Feeding Behavior</style></keyword><keyword><style  face="normal" font="default" size="100%">Fossils</style></keyword><keyword><style  face="normal" font="default" size="100%">Pan troglodytes</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2007 Feb 27</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/17360606</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">104</style></volume><pages><style face="normal" font="default" size="100%">3043-8</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Archaeological research in the African rainforest reveals unexpected results in the search for the origins of hominoid technology. The ancient Panin sites from Côte d&#039;Ivoire constitute the only evidence of prehistoric ape behavior known to date anywhere in the world. Recent archaeological work has yielded behaviorally modified stones, dated by chronometric means to 4,300 years of age, lodging starch residue suggestive of prehistoric dietary practices by ancient chimpanzees. The &quot;Chimpanzee Stone Age&quot; pre-dates the advent of settled farming villages in this part of the African rainforest and suggests that percussive material culture could have been inherited from an common human-chimpanzee clade, rather than invented by hominins, or have arisen by imitation, or resulted from independent technological convergence.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">9</style></issue><notes><style face="normal" font="default" size="100%">http://www.pnas.org/content/104/9/3043.abstract</style></notes><custom1><style face="normal" font="default" size="100%">http://www.ncbi.nlm.nih.gov/pubmed/17360606?dopt=Abstract</style></custom1></record></records></xml>