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Science 29 July 2005:
Vol. 309. no. 5735, p. 679
DOI: 10.1126/science.309.5735.679
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News of the Week

PALEONTOLOGY:
Dinosaur Embryos Hint at Evolution of Giants

Erik Stokstad

An analysis of the oldest fossilized dinosaur embryos so far discovered, described on page 761 of this issue of Science, suggests that rather than dropping down on all fours only as their bodies grew too large to be carried on two feet, sauropods were already quadrupedal even as smaller creatures.

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