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Science 14 November 2008:
Vol. 322. no. 5904, pp. 1040 - 1043
DOI: 10.1126/science.322.5904.1040
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News Focus

ANTHROPOLOGY:
The Birth of Childhood

Ann Gibbons

Unlike other apes, humans depend on their parents for a long period after weaning. But when--and why--did our long childhood evolve?

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Science. ISSN 0036-8075 (print), 1095-9203 (online)