Bone Sizes Trace the Decline of Man (and Woman)

Science  09 May 1997:
Vol. 276, Issue 5314, pp. 896-897
DOI: 10.1126/science.276.5314.896

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A standard picture of human evolution holds that our lineage evolved gradually and inexorably toward a bigger, brainier human. But a new study of the bones of 163 early members of Homo who lived 2 million to 10,000 years ago suggests that after a peak in the last ice age, our bodies--and brains--have shrunk by about 10%.