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The researchers trace the fossil record, which illustrates a timeline placing multiple species overlapping in time and geographic space. Their insights spur further questions about how these early human ancestors were related and shared resources... The 1974 discovery of Australopithecus afarensis, which lived from 3.8 to 2.9 million years ago, was a major milestone in paleoanthropology that pushed the record of hominins earlier than 3 million years ago and demonstrated the antiquity of human-like walking. Scientists have long argued that there was only one pre-human species at any given time before 3 million years ago that gave rise to another...

A new species of ancient human has been unearthed in the Afar region of Ethiopia, scientists report. Researchers discovered jaw bones and teeth, which date to between 3.3m and 3.5m years old. It means this new hominin was alive at the same time as several other early human species, suggesting our family tree is more complicated than was thought. The study is published in the journal Nature. The new species has been called Australopithecus deyiremeda, which means "close relative" in the language spoken by the Afar people. The ancient remains are thought to belong to four individuals, who would have...