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dragonfly
(Encyclopedia) dragonfly, any insect of the order Odonata, which also includes the damselfly. Members of this order are generally large predatory insects and characteristically have chewing…rail
(Encyclopedia) rail, common name for some members of the large family Rallidae, marsh and tropical forest birds that include the gallinule and the coot, two specialized rails. Rails are cosmopolitan…pole, in electricity and magnetism
(Encyclopedia) pole, in electricity and magnetism, point where electric or magnetic force appears to be concentrated. A single electric charge located at a point is sometimes referred to as an…thunderstorm
(Encyclopedia) thunderstorm, violent, local atmospheric disturbance accompanied by lightning, thunder, and heavy rain, often by strong gusts of wind, and sometimes by hail. The typical thunderstorm…Wegener, Alfred Lothar
(Encyclopedia) Wegener, Alfred LotharWegener, Alfred Lotharälˈfrĕt lōtärˈ vĕgˈənər [key], 1880–1930, German geologist, meteorologist, and Arctic explorer. Early in his life, he was on the staff of…The Chemistry of Biology: Nucleic Acids
Nucleic AcidsThe Chemistry of BiologyIntroductionAtomic TheoryChemical Reactions: Ionic, Covalent, and Polar Covalent BondsWaterOrganic ChemistryCarbohydratesLipidsProteinsNucleic AcidsVitamins and…Urals
(Encyclopedia) Urals or Ural Mountains, E European Russia and NW Kazakhstan, forming, together with the Ural River, the traditional boundary between Europe and Asia and separating the Russian plain…Weather: The Modern Era
The Modern EraWeatherRadar and SatellitesRadar—Scanning the SkiesDoppler—the New GenerationSatellites—a Far-Out LookThe Modern EraPutting It All Together Satellites are capable of providing a wealth…World Geography
Find information about the continents, explorers, oceans, seas, rivers, mountains, elevation, geographic extremes, earthquakes, volcanoes, and more. Mount Everest Quiz New! Geography…Biographies: Notable Explorers
Notable Explorers Christopher Columbus See also Columbus and Other Explorers Notable Women Adventurers People in the News Recent Obituaries Related Links Quiz: Explorers Quiz: Women…Trending
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