NATURE | Murder in the Troop | Baboon Grooming | PBS Video

Buy the DVD:… Being groomed is a highly pleasurable experience for baboons. The pulling of hair is just sufficiently painful to release endorphins, the hormones that produce natural highs.

From NATURE’s Murder in the Troop airing Sunday, May 20th at 8 p.m. (ET) on PBS (check local listings). For more information, visit