The age of Homo erectus, known familiarly as Peking Man, has been hotly debated. This week Shen et al. use a recently developed dating technique that computes deposits to be about 770,000 years old — about 300,000 years earlier than usually thought. The cover shows a replica skull reconstructed from several H. erectus fossils from Zhoukoudian. [Image: Skulls Unlimited International, Inc.]
Nature 458, 198-200 (12 March 2009) | doi:10.1038/nature07741; Received 9 September 2008; Accepted 17 December 2008
Age of Zhoukoudian Homo erectus determined with 26Al/10Be burial dating
Guanjun Shen1, Xing Gao2, Bin Gao1 & Darryl E. Granger3
- College of Geographical Sciences, Nanjing Normal University, Nanjing, Jiangsu 210046, China
- Institute of Vertebrate Paleontology and Paleoanthropology, Academia Sinica, Beijing 100044, China
- Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907-2051, USA
Correspondence to: Guanjun Shen1Darryl E. Granger3 Correspondence and requests for materials should be addressed to G.S. (Email: gjshen@njnu.edu.cn) or D.E.G. (Email: dgranger@purdue.edu).
The age of Zhoukoudian Homo erectus, commonly known as `Peking Man`, has long been pursued, but has remained problematic owing to the lack of suitable dating methods1,2,3,4,5,6,7. Here we report cosmogenic 26Al/10Be burial dating of quartz sediments and artefacts from the lower strata of Locality 1 in the southwestern suburb of Beijing, China, where early representatives of Zhoukoudian Homo erectus were discovered. This study marks the first radioisotopic dating of any early hominin site in China beyond the range of mass spectrometric U-series dating. The weighted mean of six meaningful age measurements, 0.77 
0.08 million years (Myr, mean s.e.m.), provides the best age estimate for lower cultural layers 7–10. Together with previously reported U-series dating of speleothem calcite3 and palaeomagnetic stratigraphy4, as well as sedimentological considerations8,9, these layers may be further correlated to S6–S7 in Chinese loess stratigraphy or marine isotope stages (MIS) 17–19, in the range of 
0.68 to 0.78 Myr ago. These ages are substantially older than previously supposed and may imply early hominin`s presence at the site in northern China through a relatively mild glacial period corresponding to MIS 18.
