One camp held that A. afarensis had transitioned fully to terrestrial life, and that the tree-friendly features of the upper body were just evolutionary baggage handed down from an arboreal ancestor.
One camp held that A. afarensis had transitioned fully to terrestrial life, and that the tree-friendly features of the upper body were just evolutionary baggage handed down from an arboreal ancestor.
论战的一个阵营认为他们已经完全转变为陆地生活，其上肢对于树的适应特征只是来自树栖远祖的进化残留。