1. Paleomagnetism Laboratory, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2. Human Origins Program, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0112, USA
3. Hebei Province Institute of Cultural Relics, Shijiazhuang 050000, China
4. Physics Department, California Polytechnic State University, San Luis Obispo, California 93410, USA

Correspondence to: R. X. Zhu¹R. Potts² Email: rxzhucn@yahoo.com and rxzhu@mail.igcas.ac.cn
Email: potts.rick@nmnh.si.edu

The timing of early human dispersal to Asia is a central issue in the study of human evolution. Excavations in predominantly lacustrine sediments at Majuangou, Nihewan basin, north China, uncovered four layers of indisputable hominin stone tools. Here we report magnetostratigraphic results that constrain the age of the four artefact layers to an interval of nearly 340,000 yr between the Olduvai subchron and the Cobb Mountain event. The lowest layer, about 1.66 million years old (Myr), provides the oldest record of stone-tool processing of animal tissues in east Asia. The highest layer, at about 1.32 Myr, correlates with the stone tool layer at Xiaochangliang¹, previously considered the oldest archaeological site in this region. The findings at Majuangou indicate that the oldest known human presence in northeast Asia at 40° N is only slightly younger than that in western Asia^{2, 3}. This result implies that a long yet rapid migration from Africa, possibly initiated during a phase of warm climate, enabled early human populations to inhabit northern latitudes of east Asia over a prolonged period.

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