* Caption - observational learning by chimpanzees. Each chimpanzee in a chain of up to six learned the method they saw used to open a food box and passed it on to the next chimpanzee. Here a chimpanzee demonstrates the 'lift door' approach. Image by Devyn Carter, Yerkes Center. *
A primate expert has developed an innovative technique which is providing the first clear evidence that children and chimpanzees learn the traditions of the community they live in by similar processes of imitation.