Journal
SCIENCE
Volume 299, Issue 5603, Pages 102-105Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1078004
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Geographic variation in some aspects of chimpanzee behavior has been interpreted as evidence for culture. Here we document similar geographic variation in orangutan behaviors. Moreover, as expected under a cultural interpretation, we find a correlation between geographic distance and cultural difference, a correlation between the abundance of opportunities for social learning and the size of the local cultural repertoire, and no effect of habitat on the content of culture. Hence, great-ape cultures exist, and may have done so for at least 14 million years.
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