Why do baboons have such huge teeth?

A mature male’s canines can be 4-5 cm long and are most often put to use as a display tool.  Either a threat display to ward off a potential predator, or a visual display of dominance and strength.  A wide-mouthed yawn exposing those fearsome fangs is often enough to prevent a battle among males. And it can be irresistible to the ladies. Should a male have to fight for rank, or defend the troop against a threat, their canines are very effective weapons, and can inflict a grievous injury. Lastly, they are very practical aids to process tough foods like bark or shells.