Alternatively, if the Laetoli prints were made by extendedlimb bipeds, then, by. 마, 선택은 호미닌의 이동에 드는 에너지 비용을 줄이는 역할을 했습니다. Most previous studies of the Laetoli prints, however, were qualitative and did not test specific biomechanical hypotheses about early hominin gait.