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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…

DK Science & Technology: Nuclear Energy

WHAT ARE FUSION AND FISSION? HOW IS A NUCLEAR REACTION CONTROLLED? RADIOACTIVITYFIND OUT MOREThe energy that makes the stars shine and produces the heat inside a nuclear reactor is nuclear energy.…

MTV Music Video Awards

2007 MTV Music Video Awards The 2007 Video Music Awards were presented September 9, 2007. Video of the Year Rihanna f.…

Teller, Edward

(Encyclopedia) Teller, Edward, 1908–2003, American physicist, b. Budapest, Hungary, Ph.D. Univ. of Leipzig, 1930, where he studied under Werner Heisenberg. Fleeing the Nazis, he came to the United…

Geiger counter

(Encyclopedia) Geiger counter or Geiger-Müller (G-M) counterGeiger countergīˈgər-mŭlˈər, –my&oomacr;ˈlər [key], instrument for the detection and quantitative determination of ionizing radiation…

dark energy

(Encyclopedia) dark energy, repulsive force that opposes the self-attraction of matter (see gravitation) and causes the expansion of the universe to accelerate. The search for dark energy was…

Jones, Quincy

(Encyclopedia) Jones, Quincy (Quincy Delight Jones, Jr.), 1933–, African-American musician, composer, bandleader, and music executive, b. Chicago. Jones played trumpet and sang gospel growing up, and…

West, Kanye Omari

(Encyclopedia) West, Kanye Omari, 1977- , African American rapper, b. Atlanta (some sources give Douglasville), Al. West’s father, Ray, was a…