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Science 17 January 2003:
Vol. 299. no. 5605, p. 329
DOI: 10.1126/science.299.5605.329
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News of the Week

EVOLUTIONARY BIOLOGY:
Uphill Dash May Have Led to Flight

Elizabeth Pennisi

Some evolutionary biologists propose that avian ancestors took wing by gliding from trees; others say early birds got a running start and lifted off the ground as they beat their feathered forelimbs. Now a new study reported on page 402 suggests that flight may have evolved in protobirds that used their wings to scale inclined objects and trees.

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