科研之友
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摘要
The authors identify natural bitumen on stone implements dating to 70 000 BP It is proposed that this represents residue from hafting, taking the practice back a further 30 000 years from the date previously noted and published in Nature. The bitumen was tracked to a source 40km away, using gas chromatography-mass spectrometry and carbon isotopes.
- 出版日期2008-12
- 单位中国地震局
