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radium

(Encyclopedia) radiumradiumrāˈdēəm [key] [Lat. radius=ray], radioactive metallic chemical element; symbol Ra; at. no. 88; mass number of most stable isotope 226; m.p. 700℃; b.p. 1,140℃; sp. gr. about…

DK Science: Computer Reconstruction

Dinosaur on screenRebuilt in 3-DToday computers are used in all aspects of dinosaur study. In the field, fossil sites can be mapped and plotted using electronic measuring devices. In the laboratory…

Summer Olympics Through the Years: 1928

AmsterdamTop 10 StandingsLeading Medal WinnersTrack & FieldSwimmingTeam SportsBoxingCyclingEquestrianFencingGymnasticsModern PentathlonRowingWeightliftingFreestyle WrestlingGreco-Roman…

NHL All-Star Game: North America

North America Talk about depth? The hardest job for head coach Ken Hitchcock will be finding enough ice time for everyone... not an easy task when you've got mega-stars like Eric Lindros, Wayne…

Theories of the Universe: Bang That Drum

Bang That DrumTheories of the UniverseScientific Origins of the UniverseBang That DrumA Big Bang AlternativeThe Accelerating UniversePlasma CosmologyThe Standard ModelThe Alpha and the OmegaIt's Out…

halo, in meteorology

(Encyclopedia) halo, in meteorology, short-lived circles or arcs, and less commonly spikes and crosses, of colored or whitish light surrounding the moon or sun or in clouds as seen from above. A halo…

Mondavi, Robert Gerald

(Encyclopedia) Mondavi, Robert GeraldMondavi, Robert Geraldməndäˈvē [key], 1913–2008, American vintner who was in the forefront of establishing California as a major table-wine-producing region and…

Khan, Ali Akbar

(Encyclopedia) Khan, Ali AkbarKhan, Ali Akbarälēˈ ăkˈbär khän [key], 1922–2009, Indian musician, b. Shivpur, East Bengal (now Bangladesh). A master of the sarod, a lutelike 25-stringed N Indian…

Wright, Richard

(Encyclopedia) Wright, Richard, 1908–60, American author. An African American born on a Mississippi plantation, Wright struggled through a difficult childhood and worked to educate himself. He moved…

Steitz, Thomas Arthur

(Encyclopedia) Steitz, Thomas Arthur, 1940–2018, American biophysicist and biochemist, b. Milwaukee, Ph.D. Harvard, 1966. Steitz was a professor at Yale from 1970 and a researcher at the Howard…