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Science 23 November 2007:
Vol. 318. no. 5854, p. 1236
DOI: 10.1126/science.318.5854.1236
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News Focus

SOCIETY OF VERTEBRATE PALEONTOLOGY MEETING:
Did Horny Young Dinosaurs Cause Illusion of Separate Species?

Erik Stokstad

At the Society of Vertebrate Paleontology's annual meeting, held here from 17 to 20 October, a researcher argued that what were thought to be two unique dinosaur species are in fact juveniles of different ages that would have grown up to be another species, bony-headed Pachycephalosaurus.

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