Unlike early human species, chimpanzees do not seem to be able to spontaneously make and use sharp stone tools, even when they have all the materials and incentive to do so. That was the finding of a study of a total of eleven chimpanzees at a zoo in Kristiansand, Norway, and Chimfunshi Wildlife Orphanage, a sanctuary in Zambia. The study was conducted by Dr. Elisa Bandini and Dr. Alba Motes-Rodrigo of the University of Tübingen as part of the STONECULT project led by Dr. Claudio Tennie and funded by the European Research Council. The study, which Tennie co-led with Dr. Shannon McPherron of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, has been published in the ERC-journal Open Research Europe.