![]() To understand how Homo sapiens eventually evolved from these older lineages of hominins, the group including modern humans and our closest extinct relatives and ancestors, scientists are unearthing ancient bones and stone tools, digging into our genes and recreating the changing environments that helped shape our ancestors’ world and guide their evolution. As time went on, their bodies changed, as did their brains and their ability to think, as seen in their tools and technologies. During that long interim, a menagerie of different human species lived, evolved and died out, intermingling and sometimes interbreeding along the way. One of our earliest-known ancestors, Sahelanthropus, began the slow transition from ape-like movement some six million years ago, but Homo sapiens wouldn’t show up for more than five million years. ![]() ![]() The long evolutionary journey that created modern humans began with a single step-or more accurately-with the ability to walk on two legs.
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