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Perot, H. Ross

(Encyclopedia) Perot, H. Ross (Henry Ross Perot), 1930–2019, American business executive and political leader, b. Texarkana, Tex., as Henry Ray Perot, grad. Annapolis, 1953. In 1957 he resigned his…

xenon

(Encyclopedia) xenonxenonzēˈnŏn [key] [Gr.,=strange], gaseous chemical element; symbol Xe; at. no. 54; at. wt. 131.293; m.p. −111.9℃; b.p. −107.1℃; density 5.86 grams per liter at STP; valence…

Carver, Raymond

(Encyclopedia) Carver, Raymond, 1938–88, American short-story writer, b. Clatskanie, Oreg. He was raised in the Pacific Northwest, where he often set his sparely written tales of everyday blue-collar…

periodic law

(Encyclopedia) periodic law, statement of a periodic recurrence of chemical and physical properties of the elements when the elements are arranged in order of increasing atomic number. Such an…

Selected Biographies: H

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z More Biographies Don't see the biography you're looking for? Search 30,000+ biographies Biographies…

Roundup of Recent Science Discoveries, 1997

Was Three Company? Past evidence uncovered in Israel and France has shown that Neanderthals lived on Earth at the same time as modern Homo sapiens. Neanderthals were found to have lived about 34,…

Science Questions

What causes a rainbow? A rainbow in Indiana, Oct. 2015. Source: AP Photo/Michael Conroy Although light looks colorless, it’s made up of many colors-red, orange, yellow, green, blue…

Baseball Contraction FAQs

Baseball Contraction FAQs The nitty gritty by John Gettings RELATED LINKS Contraction Primer Contraction Timeline Baseball Commissioner Bud Selig Major…

Jacksonville, Fla.

Mayor: Alvin Brown (to June 2015)2010 census population (rank): 821,784 (11); Male: 398,294 (48.5%); Female: 423,490 (51.5%); White: 488,473 (59.4%); Black: 252,421 (30.7%); American Indian and…