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Manhattan Project

(Encyclopedia)Manhattan Project, the wartime effort to design and build the first nuclear weapons (atomic bombs). With the discovery of fission in 1939, it became clear to scientists that certain radioactive materi...

White House

(Encyclopedia)White House, official name of the executive mansion of the President of the United States. It is on the south side of Pennsylvania Ave., Washington, D.C., facing Lafayette Square. The building, constr...

Straus

(Encyclopedia)Straus strous [key], family of American merchants, public officials, and philanthropists. Isidor Straus, 1845–1912, b. Rhenish Bavaria, emigrated (1854) with his brothers to the United States in ord...

Tehran

(Encyclopedia)Tehran or Teheran both: tāˌəränˈ, –rănˈ [key], city (1991 pop. 6,475,527), capital of Iran and Tehran prov., N Iran, near Mt. Damavand. It is Iran's largest city and its administrative, comme...

Pearl Harbor

(Encyclopedia)Pearl Harbor, land-locked harbor, on the southern coast of Oahu island, Hawaii, W of Honolulu; one of the largest and best natural harbors in the E Pacific Ocean. In the vicinity are many U.S. militar...

tap dance

(Encyclopedia)tap dance, theatrical dance form in which the dancer, wearing shoes with metal heel and toe taps, beats out complex, syncopated rhythms on the floor. After a slump in popularity in the 1960s, tap ...

Butler, Nicholas Murray

(Encyclopedia)Butler, Nicholas Murray, 1862–1947, American educator, president of Columbia Univ. (1902–45), b. Elizabeth, N.J., grad. Columbia (B.A., 1882; Ph.D., 1884). Holding a Columbia fellowship, he studie...

state of emergency

(Encyclopedia)state of emergency, situation in which a government or a government body is empowered to act with enhanced powers in order to respond to a crisis. The enhanced or emergency powers, and in many cases i...

Presidents of the United States (table)

(Encyclopedia)Presidents of the United States

biography

(Encyclopedia)biography, reconstruction in print or on film, of the lives of real men and women. Together with autobiography—an individual's interpretation of his own life—it shares a venerable tradition, meeti...