Look at the skull of specimens, our skullshape and size from the 23 different flat bone and the bone structure not owned.
请看这个颅骨的标本，我们的颅骨由23块形状大小不同的扁骨和不归则骨构成。
2
If the "Out of Africa" hypothesis is right, that decreasing variability should be reflected in skullshape-since this is ultimately under genetic control.
如果“走出非洲”说是正确的，那么趋同性应该在头骨上有所体现——因为它主要是由基因控制的。
3
With features that can vary somewhat in form without greatly affecting function, such as the shape of the skull, chance might play a bigger role in their evolution than natural selection.