Discovery Online highlights a paper co-authored by Professor Jacinta Beehner and David Pappano, a Michigan Anthropology alum and current NSF postdoctoral research fellow at Princeton University's Department of Ecology and Evolutionary Biology.

Male leaders of harems are often overworked and tired finds the study, published in the latest issue of Royal Society Open Science. Gelada baboons exemplify the problems.

"Being a gelada leader male is fairly exhausting," co-author David Pappano told Discovery News. "In order to keep the females within his harem happy, gelada leader males spend a lot of time grooming them."