Pet Rocks

Environmental & Science Education
STEM
Behavior
Biological Evolution
Culture
Society
Edward Hessler

Harvard anthropologist Richard Wrangham, a member of the Department of Human Evolutionary Biology, founded the Kibale Chimpanzee Project (Uganda) in 1987.

Here is a short film (~5 minutes) of a conversation between Wrangham and the BBC's Melissa Hogenboom (filmed, I think, by Pierangelo Pirak) about a unique--in the sense that it has not been seen in other chimpanzee groups--form of chimpanzee play. The film alternates nicely between Wrangham and Hogenboom and footage taken of chimpanzees playing with rocks or "dolls" as the BBC puts it.