Dr Bishop here discusses the isotopic dating methods used in developing a time-scale for continental deposits yielding hominid and other mammalian fossils from the past 5 million years.
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BISHOP, W. The Tempo of Human Evolution. Nature 244, 405–409 (1973). https://doi.org/10.1038/244405a0
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DOI: https://doi.org/10.1038/244405a0
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