HOW DO GLACIERS FORM? WHAT ARE ICE CAPS? ICEBERG FIND OUT MOREAt the poles and on high mountains, vast areas are covered in ice—in rivers of ice called glaciers, and in layers of ice called ice…
(Encyclopedia) Ellsworth, Lincoln, 1880–1951, American explorer, b. Chicago, Ill. He was a surveyor and engineer in railroad building and later a prospector and mining engineer in NW Canada. He…
(Encyclopedia) jet stream, narrow, swift currents or tubes of air found at heights ranging from 7 to 8 mi (11.3–12.9 km) above the surface of the earth. They are caused by great temperature…
(Encyclopedia) Peary, Robert EdwinPeary, Robert Edwinpērˈē [key], 1856–1920, American arctic explorer, b. Cresson, Pa. In 1881 he entered the U.S. navy as a civil engineer and for several years…
Vitamins and MineralsThe Chemistry of BiologyIntroductionAtomic TheoryChemical Reactions: Ionic, Covalent, and Polar Covalent BondsWaterOrganic ChemistryCarbohydratesLipidsProteinsNucleic…
Chris Van Allsburg won Caldecott Medals for his lavishly illustrated books Jumanji (1982) and The Polar Express (1986). Chris Van Allsburg's books are known for their mysterious stories and…
Germaine Greer is the author of 1970's The Female Eunuch, a pioneering and influential work in the history of feminist literature. A scholar, journalist, social critic, media personality and…
(Encyclopedia) Stefansson, VilhjalmurStefansson, Vilhjalmurvĭlˈhyoulmər stĕfˈənsən [key], 1879–1962, Arctic explorer, b. Canada, of Icelandic parents, educated at the Univ. of North Dakota, the State…
