"Primate Archaeology."

Michael Haslam, Adriana Hernandez-Aguilar, Victoria Ling, Susana Carvalho, Ignacio de la Torre, April DeStefagno, Andrew Du, Bruce Hardy, Jack Harris, Linda Marchant, Tetsuro Matsuzawa, William McGrew, Julio Mercader, Rafael Mora, Michael Petraglia, Helene Roche, Elisabetta Visalberghi, Rebecca Warren.

Nature. 16 July 2009.
HTML http://www.nature.com/nature/journal/v460/n7253/full/nature08188.html
PDF http://www.nature.com/nature/journal/v460/n7253/pdf/nature08188.pdf

Summary:
All modern humans use tools to overcome limitations of our anatomy and to make difficult tasks easier. However, if tool use is such an advantage, we may ask why it is not evolved to the same degree in other
species. To answer this question, we need to bring a long-term perspective to the material record of other members of our own order, the Primates.

photo: Stone-tool use by wild chimpanzees at Bossou, Guinea

video: Stone -tool use by wild chimpanzees at Bossou, showing the observational learning called "Education by master-apprenticeship"
Stone-tool use by wild chimpanzees at Bossou, Education by master-apprenticeship

News sites

science daily
http://www.sciencedaily.com/releases/2009/07/090715131437.htm

e! Science News
http://esciencenews.com/articles/2009/07/15/primate.archaeology.sheds.light.human.origins

labs paces
http://labspaces.net/98658/Primate_archaeology_sheds_light_on_human_origins