Concentrations of “elemental carbon” in samples from the Peking Man Site at Zhoukoudian and the poss

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“Elemental carbon” (EC) is a C-rich,O-H-S-N-depleted substance that is necessarily produced in the process of combustion. Due to the long-term use of fire by cave-inhabiting ape-men, considerable amounts of “elemental carbon” would be necessarily left beh
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