This photo provided by the Suaq foundation shows Rakus, a wild male Sumatran orangutan in Gunung Leuser National Park, Indonesia, on Aug. 25, 2022, after his facial wound was barely visible. Two months earlier, researchers observed him apply chewed leaves from a plant, used throughout Southeast Asia to treat pain and inflammation and to kill bacteria, to the wound. (Safruddin/Suaq foundation via AP)