最初的人出现在距今多少年前?最初的人出现在哪块大陆上?这两个问题困扰了人类学家许多年,至今仍是争论不休的焦点。达尔文在他的《人类的由来》(1871年出版)一书中曾大胆推测“我们早期的祖先更可能生活在非洲”。当达尔文写下这些话时,在任何地方都没有发现早期的人类化石。从那时到现在,人类学家在非洲已经发掘出比其他大洲数量更多、年代更早的人类始祖 How many years ago did the first humans appear and where did the first humans appear? These two problems have plagued anthropologists for many years and are still the focus of controversy. In his book The Origins of Man (1871), Darwin had boldly speculated that “our earlier ancestors were more likely to live in Africa.” When Darwin wrote these words, no earlier human fossils were found anywhere. Since then, anthropologists in Africa have unearthed more and more ancient human ancestors than any other continent