AMES, Iowa – Iowa State University Anthropology Professor Jill Pruetz long suspected that man-made changes influenced the aggressive behavior researchers have observed among chimpanzees. However, her ...

A urinalysis shows that these apes ingest significant amounts of alcohol, providing new clues to how alcohol influences the animals’ behavior ...

AMES, Iowa – Shocking is one word Jill Pruetz uses to describe the behavior she witnessed after a chimp was killed at her research site in Fongoli, Senegal. The fact that chimps would kill a member of ...

The riskiest behavior in humans peaks in adolescence. Researchers from the University of Michigan and James Madison University expected to find risky behavior to peak in adolescence in a study of ...

In the 1960s and 70s, a group of chimpanzees astonished the world by learning sign language. Only two remain and one question ...

A new book edited by chimpanzee experts Drs. Lydia Hopper, Assistant Director of the Lester E. Fisher Center for the Study and Conservation of Apes, and Stephen Ross, Director of the Center, called ...

An experimental study of modern chimpanzees has documented patterns of behavior that seemingly mirror those of our prehistoric human ancestors, casting light on how our predecessors may have utilized ...

Jane Goodall always remembered the first time a wild chimpanzee took a banana from her outstretched hand. In that moment, she would often say, the chimp—a grizzled male she had dubbed David ...