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About the Cover


A hamster brain and a human brain with three computer-generated intermediates to show the differential scaling of brain regions as brain size increases in mammals. A highly conserved sequence of neurogenesis produces predictable and disproportionate growth of late-generated structures as brain size increases. This suggests that processing capacity for specific functions is gained primarily by general rather than local increases in brain size. See page 1578. [Image: J. C. Crowley]


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