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Science 27 June 2008:
Vol. 320. no. 5884, p. 1790
DOI: 10.1126/science.320.5884.1790b
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In the 27 June 2008 show, hear about the upward shift of plant species' optimum elevation, evolutionary history of birds, your Letters to Science, and more.

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