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"This young chacma baboon is sitting on its mother's back playing the fool."

For example, previous studies discovered that female chacma baboons with strong social bonds outlived their less social counterparts.

The research, which focused on chacma baboons, spanned 13 years.

The male chacma are about twice the size of females and aggressively fight one another and engage in howling competitions to establish dominance.

Some of its most visible and intriguing creatures are roughly 500 chacma baboons.