sentences:  A study that analyzed the development of molars in hominids and Miocene apes found that a larger “ratio of the areas of [molar 1] and [molar 3]” could correlate to an increase in fruits found in the diet of these species.An increased ratio of the areas of molars was found to have a negative correlation with the amount of “leaves, flowers, and shoots” in the diet, suggesting that species like Ardipithecus, which had a greater ratio of areas of molars, had gradually transitioned to including more fruit in their diet as the size of their molars increased.Many modern primates who lack such dietary features have been shown to occasionally rely on "fall-back foods" of these sorts, implying robust Australopithecines developed post-canine megadontia as they had to more heavily rely on such foods.