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Krugman, Paul

(Encyclopedia) Krugman, PaulKrugman, Paulkr&oomacr;gˈmən [key], 1953–, American economist, b. Long Island, N.Y., grad. Yale (B.A., 1974), Massachusetts Institute of Technology (Ph.D., 1977). A…

Igor I. Sikorsky

Born: 1889Birthplace: Kiev, Ukraine Helicopter controls—Sikorsky's patents covered control and stability improvements. The single rotor helicopter developed by Sikorsky represented a major…

The Weight of Gasoline

The Question: Do you know the weight (lbs) of a gallon of gasoline? A gallon of water? Thank you. The Answer: Thanks for e-mailing Information…

DK Science: Lasers

HOLOGRAMLASER LIGHT SHOWFIND OUT MORESome beams of light are powerful enough to cut through metal. Others are precise enough to use for delicate surgery on people’s bodies. These remarkable…

Accurate Mechanical Clocks

Source: National Institute of Standards and Technology Physics Laboratory In Europe during most of the Middle Ages (roughly 500 to 1500 A.D.), technological advancement was at a virtual standstill…

Asian Americans in Business and Media

Jerry YangBiographies ofNotable Asian Pacific AmericansA-Z ListGovernment Officials and PoliticiansBusiness and Media LeadersAthletes & Sports PersonalitiesScientistsEntertainers:…

Willard Boyle

Born: 1924 Birthplace: Nova Scotia Charge-coupled device—The charge-coupled device (CCD) was key to advancing…

Müller, Karl Alexander

(Encyclopedia) Müller, Karl Alexander, 1927–, Swiss physicist, Ph.D. Swiss Federal Institute of Technology, 1958. In 1983, Müller and co-researcher Johannes Georg Bednorz discovered superconductivity…

Carnegie Mellon University

(Encyclopedia) Carnegie Mellon University, at Pittsburgh, Pa.; est. 1967 through the merger of the Carnegie Institute of Technology (founded 1900, opened 1905) and the Mellon Institute of Industrial…