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Secrets of squirrel speciation
Email: Richard Robinson - rrobinson@nasw.org News from The Scientist 2003, 4(1):20030221-03 doi:10.1186/20030221-03
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Major climatic and tectonic episodes can drive speciation; rising sea levels can close land bridges, for instance, while a rise in temperature can promote the expansion of grassland at the expense of forests. In the 20 February Sciencexpress, John Mercer and Louise Roth at Duke University, Durham, North Carolina, US, show that major events in the diversification of squirrels are timed with large-scale changes in the Earth's climate (Sciencexpress, DOI:10.1126/science.1079705, February 21, 2003).
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