Researchers conducted a study on captive apes to understand their behavior. They interacted with the animals in a way that triggered a natural response. The study involved several species, including gorillas and chimpanzees.

Details of the study are available from local news sources. It appears that the researchers were trying to learn more about the evolutionary history of certain behaviors. Further information on the study's findings can be found through KSAT 12, a local news outlet serving the Alamo Heights area.

The study's results may provide insight into the similarities between humans and great apes.