You can see some of the major fossil sites that we've been working in the north. But, essentially, two million years ago, Homo erectus, up in the far right corner, lived alongside three other species of human ancestor.
你可以看到我们在北部涉足过的 一些主要的化石遗址。但事实上两百万年前 右上角的直立猿人, 和其余的三个种类的人类祖先都曾居住在这一带。