関連ワード:  oldowan tools were used by    acheulean tools were used by    mousterian tools were used by    oldowan tools were used by at least one australopithecine species    acheulean tools were used for animal butchery    oldowan tools were most likely used for    oldowan and acheulean tools were used for hunting true or false    how do we believe oldowan tools were used by early hominins