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Science 14 January 2005:
Vol. 307. no. 5707, p. 194
DOI: 10.1126/science.307.5707.194b
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News of the Week

DEVELOPMENTAL BIOLOGY:
Bird Wings Really Are Like Dinosaurs' Hands

Elizabeth Pennisi

Molecular studies have smoothed a wrinkle in the assumption that modern birds had dinosaur ancestors: Researchers have concluded that the three digits in bird wings correspond to the three digits in dinosaurs' forelimbs.

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