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Science 3 December 2004:
Vol. 306. no. 5702, pp. 1693 - 1694
DOI: 10.1126/science.1098138
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Perspectives

DEVELOPMENTAL BIOLOGY:
Bits and Pieces

Alessandro Minelli

What is a segment? In a thoughtful Perspective, Minelli explores segmentation during development of the pill millipede, and in so doing challenges prevailing views of what constitutes a segment.

The author is in the Department of Biology, University of Padova, I 35131 Padova, Italy. E-mail: alessandro.minelli{at}unipd.it

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