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The Chemistry of Biology: Carbohydrates

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

DK Science: Satellites

HOW SATELLITES WORKSATELLITE COMMUNICATIONSORBITSFIND OUT MOREAn object that circles another in space is called its satellite. Earth has one natural satellite, the Moon, but a swarm of…

DK Science: Climate

EQUATORIAL FORESTCLIMATE ZONESHEAT FROM THE SUNMOUNTAIN CLIMATESCOASTAL CLIMATESSEASONSFIND OUT MOREEvery part of Earth has its own climate – the typical pattern of weather over a long period…

Tarpeia

(Encyclopedia) TarpeiaTarpeiatärpēˈyə [key], in Roman legend, a Roman woman who betrayed her city to the Sabines for what they wore on their left arms (their gold bracelets). As they entered Rome…

Walter Payton

  Walter PaytonJuly 25, 1954—November 1, 1999   by Michael Morrison   Walter Payton, the former Chicago Bears running back and current all-time leader in NFL career rushing…

Etah

(Encyclopedia) EtahEtahēˈtə [key], abandoned village, NW Greenland, on Smith Sound, opposite Ellesmere Island. The Eskimo tribe discovered there by John Ross in 1818 is known as the Polar Eskimo and…

Kotelny Island

(Encyclopedia) Kotelny IslandKotelny Islandkōtĕlˈnē [key], largest island of the Anjou group of the New Siberian Islands, c.100 mi (160 km) long and c.60 mi (100 km) wide, off N Siberian Russia. The…

Mawson, Sir Douglas

(Encyclopedia) Mawson, Sir Douglas, 1882–1958, Australian antarctic explorer and geologist, b. England. His first geographical expedition was to the New Hebrides Islands as a geologist in 1903. As a…

Christ of the Andes

(Encyclopedia) Christ of the Andes, statue of Jesus commemorating a series of peace and boundary treaties between Argentina and Chile. Dedicated Mar. 13, 1904, it stands in Uspallata Pass, high in…

Parsons, Sir Charles Algernon

(Encyclopedia) Parsons, Sir Charles Algernon, 1854–1931, British engineer. He invented a revolutionary steam turbine that bears his name. His first turbines were constructed to drive generators to…