This colored diagram shows that revised dates for six Chinese H. erectus sites, including the Peking Man site at Zhoukoudian, correspond to specific periods of either cold and dry or warm and moist climates. Magnetic reversals measured in soil at each site provide a general age frame for the sequence of occupations, from 790,000 to 1.18 million years ago.
Credit: Bettis/Ciochon/U. of Iowa
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