A research group led by Prof. Zhu Rixiang from the CAS Institute of Geology and Geophysics and their U.S. collaborators have come up with convincing evidence that early human ancestors lived at high latitudes of north China in northeast Asia as early as about 1.66 million years ago. In a recent issue of the journal Nature, the researchers report their magnetostratigraphic studies into the four artefact layers of predominantly lacustrine sediments at Majuangou, Nihewan basin, north China. They found that all the layers contained indisputable stone tools apparently made by early humans, known to researchers as "hominins," and its lowest one is about 1.66 million years old (Myr), providing the oldest known record of stone-tool processing of animal tissues in east Asia.
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