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History of the Summer Vacation

  By Rachael Stark Why does the American school year start in September and end in June? It's something of a mystery. Did children once "bring in the harvest" on the family farm all summer in the…

Cell Theory, Form, and Function: Introduction

IntroductionCell Theory, Form, and FunctionIntroductionProkaryotes and EukaryotesVirusesFluid Mosaic Model of Membrane Structure and FunctionCell Cycle: Interphase, Mitosis, Cytokinesis Deep…

Cell Theory, Form, and Function: Viruses

VirusesCell Theory, Form, and FunctionIntroductionProkaryotes and EukaryotesVirusesFluid Mosaic Model of Membrane Structure and FunctionCell Cycle: Interphase, Mitosis, Cytokinesis Viruses are…

The Chemistry of Biology: Water

WaterThe Chemistry of BiologyIntroductionAtomic TheoryChemical Reactions: Ionic, Covalent, and Polar Covalent BondsWaterOrganic ChemistryCarbohydratesLipidsProteinsNucleic AcidsVitamins and Minerals…

Rorty, Richard

(Encyclopedia) Rorty, Richard, 1931–2007, American philosopher. b. New York City. After studying at the Univ. of Chicago (B.A. 1949, M.A. 1952) and Yale (Ph.D. 1956), Rorty taught philosophy at…

Seligman, Edwin Robert Anderson

(Encyclopedia) Seligman, Edwin Robert AndersonSeligman, Edwin Robert Andersonsĕlˈĭgmən [key], 1861–1939, American economist, b. New York City, Ph.D. Columbia, 1885. As professor (1885–1931) at…

Rosenzweig, Franz

(Encyclopedia) Rosenzweig, FranzRosenzweig, Franzfränts rōˈzəntsvīkhˌ [key], 1886–1929, German-Jewish philosopher, b. Kassel. As a youth he was thoroughly trained in German philosophy and, after a…