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Dr. John Kappelman, Professor of Anthropology, UT Austin
Paleoanthropologist speaks about Modern Humans migration 'out of Africa':
Blue Highways: Middle Stone Age Foraging Behaviors Along…
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Dr. James K. Meen, Researcher and Professor at the University of Houston, on a lecture about Superconductors: some of the most amazing materials in current science and engineering!
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binary ionic and covalent compounds
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Compounds Non binary and acid
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