Ancient tooth proteins suggest homo erectus may have left genetic legacy in modern-day humans
For most of the 20th century, the model of human origins was viewed as a tree: with the trunk dividing into branches, and then twigs. Each species of human relative (hominin) was considered a neat, single branch. Neanderthals, Homo erectus, and other ancient relatives were evolutionary dead ends — unfortunate cousins who left no descendants. In the 30 years since…
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