The fur-rubbing white-faced capuchins and the charcoal-eating red colobus monkeys seen in Clever Monkeys are just two examples of medical ingenuity in primates.

For baboons, grooming is a highly pleasurable activity. The pulling of hair releases endorphins.

Whether they involve defending each other or offering gentle and nurturing support, one thing is certain -- friendships are vital to chacma baboon society.

Like all primates, chacma baboons often express themselves through physical contact, from reassuring touches and pats to antagonistic bites and swats.