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cloud chamber

(Encyclopedia) cloud chamber, device used to detect elementary particles and other ionizing radiation. A cloud chamber consists essentially of a closed container filled with a supersaturated vapor, e…

Star-Spangled Banner, The

(Encyclopedia) Star-Spangled Banner, The, American national anthem, beginning, “O say can you see by the dawn's early light.” The words were written by Francis Scott Key, a young Washington attorney…

Biographies of the Presidents

  Read bios on all of the U.S. presidents from George Washington to Ulysses S. Grant to Barack Obama. George Washington John Adams Thomas Jefferson James Madison…

Minorities and Women in the 110th Congress

Check out the lists of minorities and women in the 110th Congress, along with which state and political party they represented. The 110th Congress was the meeting of the legislative branch of the…

Billie Holiday

(Eleanora Fagan)jazz singerBorn: 4/7/1915Birthplace: Baltimore, Maryland Jazz singer known for her emotion-laden vocal performances. She performed with Benny Goodman, Duke Ellington, Count Basie…

Jackie Chan

(Kong Sung Chan)actor, directorBorn: 4/7/1954Birthplace: Hong Kong Film actor and director best known for his hyperkinetic action films that combine slapstick comedy with skillful martial arts.…

Highest Denomination of U.S. Bills

The Question: What was the highest denomination of bill the U.S. Treasury ever printed and which president is on it? The Answer: The highest…

Changing Views of Free Speech in the U.S.

Many Americans, including many who supported the new Constitution, criticized the document because it lacked a bill of rights—a listing of the basic rights held by people against the new national…