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Body mass and encephalization in Pleistocene Homo

Nature volume 387, pages 173–176 (1997)Cite this article

Abstract

Many dramatic changes in morphology within the genus Homo have occurred over the past 2 million years or more, including large increases in absolute brain size and decreases in postcanine dental size and skeletal robusticity. Body mass, as the 'size' variable against which other morphological features are usually judged, has been important for assessing these changes1–5. Yet past body mass estimates for Pleistocene Homo have varied greatly, sometimes by as much as 50% for the same individuals2,3,6–12. Here we show that two independent methods of body-mass estimation yield concordant results when applied to Pleistocene Homo specimens. On the basis of an analysis of 163 individuals, body mass in Pleistocene Homo averaged significantly (about 10%) larger than a representative sample of living humans. Relative to body mass, brain mass in late archaic H. sapiens (Neanderthals) was slightly smaller than in early 'anatomically modern' humans, but the major increase in encephalization within Homo occurred earlier during the Middle Pleistocene (600–150 thousand years before present (kyr BP)), preceded by a long period of stasis extending through the Early Pleistocene (1,800 kyr BP).

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Authors and Affiliations

  1. Department of Cell Biology and Anatomy, Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, Maryland, 21205, USA

    Christopher B. Ruff

  2. Department of Anthropology, University of New Mexico, Albuquerque, New Mexico, 87131, USA

    Erik Trinkaus

  3. Department of Anthropology, College of William and Mary, Williamsburg, Virginia, 23187-8795, USA

    Trenton W. Holliday

  4. URA 376 du C.N.R.S., Universite de Bordeaux I, 33405, Talence, France

    Erik Trinkaus

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  3. Trenton W. Holliday
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Ruff, C., Trinkaus, E. & Holliday, T. Body mass and encephalization in Pleistocene Homo. Nature 387, 173–176 (1997). https://doi.org/10.1038/387173a0

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