Birds spend a lot of time and energy singing, but they don’t do it the same way in every season of the year. And some can’t sing at all. What’s the purpose of birdsong?
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People have probably always wanted clean and healthy teeth. What they historically used to achieve dental hygiene might surprise you.
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Professor of Biology, Clarkson University
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Professor of Astronomy, UMass Lowell
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Distinguished Professor Emeritus of Anthropology, Binghamton University, State University of New York
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Associate Professor of Earth and Planetary Sciences, University of Tennessee
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Doctoral Student in Biomedical Sciences, University of South Carolina
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Assistant Professor of Gastroenterology and Hepatology, School of Medicine, University of Washington
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Professor and Chair of History Department, Colorado State University
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Assistant Professor of Astronomy and Astrophysics, University of Maryland, Baltimore County
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Associate Professor of Physics, University of Richmond
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Associate Professor of Veterinary Clinical Sciences, Oklahoma State University
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Harold T. Stearns Professor of Earth Science, Wesleyan University
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Assistant Professor of Physics and Astronomy, Rochester Institute of Technology
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Vice President of Academic Affairs and Dean of the College, Grinnell College
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Executive Dean of the College of Arts, Sciences & Education and Professor of Biological Sciences, Florida International University
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Associate Professor of Astronomy, Boise State University
