Digging things up out of the ground, and largely on the basis of morphology -- the way things are shaped, often skull shape -- saying, "This looks a little bit more like us than that, so this must be my ancestor.
他们挖掘古生物遗迹， 大部分的分类是根据样貌， 古生物是什么样子的，多数是根据头骨的样子，好比说 “这个比那个看起来更像我们一点点，那么这个想必是我的祖先。