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^Cordain, Loren. Implications of Plio-pleistocene diets for modern humans. Peter S. Ungar (编). Evolution of the human diet: the known, the unknown and the unknowable. 2007: 264–5. "Since the evolutionary split between hominins and pongids approximately 7 million years ago, the available evidence shows that all species of hominins ate an omnivorous diet composed of minimally processed, wild-plant, and animal foods.