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Martin Luther King, Jr., Biography

1929—1968, American clergyman and civil rights leader   Dr. Martin Luther King, Jr., prepares to speak to a crowd of 200,000 marchers in Washingtion, DC. Related Links…

Earl BLUMENAUER, Congress, OR (1948)

BLUMENAUER, Earl, a Representative from Oregon; born in Portland,Multnomah County, Oreg., August 16, 1948; graduated from Centennial High School, 1966; B.A., Lewis and Clark College, Portland…

gamma-ray astronomy

(Encyclopedia) gamma-ray astronomy, study of astronomical objects by analysis of the most energetic electromagnetic radiation they emit. Gamma rays are shorter in wavelength and hence more energetic…

Dolby, Ray Milton

(Encyclopedia) Dolby, Ray Milton, 1933–2013, American inventor, audio engineer, and corporate executive, B.S. Stanford, 1957, Ph.D. Cambridge, 1961. While a teenager, he worked for Ampex Corp. (1949–…

Robinson, Sugar Ray

(Encyclopedia) Robinson, Sugar Ray, 1920–89, American boxer, b. Detroit as Walker Smith, Jr. He began boxing after three years of high school in New York City. Having won all his amateur fights (…

Baker, Ray Stannard

(Encyclopedia) Baker, Ray Stannard, pseud. David Grayson, 1870–1946, American author, b. Lansing, Mich., grad. Michigan State College (now Michigan State Univ.), 1889. At first a Chicago newspaper…

ray, in zoology

(Encyclopedia) ray, extremely flat-bodied cartilaginous marine fish, related to the shark. The pectoral fins of most rays are developed into broad, flat, winglike appendages, attached all along the…

ray, in physics

(Encyclopedia) ray, in physics, term denoting the straight line along which light or other form of radiation is propagated from its source. It generally refers to the line of propagation of waves but…