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Determining the Age of the Earth (March 2013)
Special Editions
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Stumbling Toward an Understanding of Geologic Timescales; Determining the Age of the Earth; by Paul S. Braterman; 4 Page(s)
For centuries scholars sought to determine the age of the earth, but the answer had to wait for careful geologic observation, isotopic analyses of the elements and an understanding of radioactive decay
PAUL S. BRATERMAN is an honorary faculty member at the University of Glasgow in Scotland, where he now resides, and professor emeritus of chemistry at the University of North Texas. He is author of more than 120 scientific articles and the popular science book From Stars to Stalagmites: How Everything Connects. His present focus is on increasing public understanding of science and scientists, and he serves on the Committee of the British Center for Science Education.
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Origin of Solar and Sidereal Heat; Determining the Age of the Earth; by Daniel Kirkwood; 1 Page(s)
June 8, 1878
DANIEL KIRKWOOD (1814—1895) was an American astronomer best known for his work on the orbits of asteroids and planets.
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Earth Tremors; Determining the Age of the Earth; by Staff Editor; 2 Page(s)
January 7, 1882
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The Age of the Earth; Determining the Age of the Earth; by F. A. Lindemann; 1 Page(s)
September 18, 1915
FREDERICK ALEXANDER LINDEMANN (1886—1957) was an English physicist who became a science adviser to the British government—in particular to Winston Churchill—during the 1940s.
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Halley on the Age of the Ocean; Determining the Age of the Earth; by George F. Becker; 1 Page(s)
April 30, 1910
GEORGE FERDINAND BECKER (1847—1919), an American geologist, studied the origin of ore deposits in the western U.S.
during his tenure with the U.S. Geological Survey.
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The Age of the Ocean; Determining the Age of the Earth; by Frank Wigglesworth Clarke; 1 Page(s)
May 17, 1913
FRANK WIGGLESWORTH CLARKE (1847—1931), an American chemist, is sometimes called the "Father of Geochemistry." He studied the composition of the earth's crust and was a founder and president of the American Chemical Society.
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The Birth-Time of the World; Determining the Age of the Earth; by J. Joly; 3 Page(s)
Methods of Determining Its Age
JOHN JOLY (1857—1933) was an Irish physicist. In addition to his research into geologic time, he developed radiotherapy as a cancer treatment.
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Sea-Salt and Geologic Time; Determining the Age of the Earth; by H. S. Shelton; 2 Page(s)
A Discussion of Prof. Joly's Method of Determining the Age of the World
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The Age of the Earth; Determining the Age of the Earth; by Staff Editor; 1 Page(s)
February 26, 1881
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Origin of Radium; Determining the Age of the Earth; by Staff Editor; 1 Page(s)
July 3, 1904
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Changes in the Earth; Determining the Age of the Earth; by Robert John Strutt; 2 Page(s)
How radioactivity has affected rocks
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Uranium and Geology; Determining the Age of the Earth; by John Joly; 1 Page(s)
The significance of radioactive material in the Earth's crust
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Some Cosmical Aspects of Radioactivity; Determining the Age of the Earth; by E. Rutherford; 4 Page(s)
The distribution of radioactive matter
ERNEST RUTHERFORD (1871—1937) was a British experimentalist best known for his discovery of the atomic nucleus.
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Radium and the Evolution of the Earth's Crust; Determining the Age of the Earth; by Arthur Holmes; 1 Page(s)
August 2, 1913
ARTHUR HOLMES (1890—1965) was a British geologist who studied the age of the earth and continental drift.
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The Heavens in June, 1921; Determining the Age of the Earth; by Henry Norris Russell; 3 Page(s)
June 4, 1921
HENRY NORRIS RUSSELL (1877—1957), an American astronomer, is best known for the Hertzsprung-Russell diagram, which shows the relation between stars' luminosities and their temperature, but he also made contributions to atomic physics.
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How Old is the Earth?; Determining the Age of the Earth; by Alfred C. Lane; 4 Page(s)
How geologists, physicists, geophysicists, and other scientists are pooling their knowledge for a combined attack on this ever-fascinating problem
ALFRED CHURCH LANE (1863—1948) was an American geologist. The following is his biography as it appeared in the issue: "Professor Lane's eminent career as a geologist has helped
to fit him for the latest work for which he has been selected by the leaders of science—the determination of the earth's antiquity by means of the radioactivity of rocks. Educated at Harvard and at Heidelberg, he served during several years as State Geologist of Michigan. Later he was professor of geology at Tufts College. To be exact, his profession is petrology."
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The Earliest History of the Earth; Determining the Age of the Earth; by Derek York; 7 Page(s)
January 1993
DEREK YORK has spent more than three decades refining the tools of geochronology to investigate the earth's distant past. York received his D.Phil. from the University of Oxford in 1960, at which point he joined the department of physics at the University of Toronto. He has also been extensively involved in the popularization of science. York has frequently contributed news stories to the Globe and Mail and was a guiding force behind the 1990 film Chaos, Science and the Unexpected, produced by the Canadian Broadcasting Corporation.
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Theory of the Earth, Parts 1 and 2; Determining the Age of the Earth; by Archibald Geikie; 5 Page(s)
September 17, 1892; September 24, 1892
ARCHIBALD GEIKIE (1835—1924) was a Scottish geologist and writer. He participated in the British Geological Survey and was particularly interested in volcanic geology.
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Estimates of Geologic Time; Determining the Age of the Earth; by Warren Upham; 3 Page(s)
April 8, 1893
WARREN UPHAM (1850—1934), an American geologist, is best known for his work on the ancient glacial Lake Agassiz in Minnesota.
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The Age of the Earth, Parts 1, 2, and 3; Determining the Age of the Earth; by W. J. Sollas; 6 Page(s)
October 20, 1900; October 27, 1900; November 3, 1900
WILLIAM JOHNSON SOLLAS (1849—1936) was a British geologist and anthropologist whose research encompassed a wide range of topics in geology and paleontology.
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The Age of the Sun and the Earth; Determining the Age of the Earth; by Florian Cajori; 2 Page(s)
September 12, 1908
FLORIAN CAJORI (1859—1930) was a Swiss-American historian of science and mathematics.
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The Age of the Earth; Determining the Age of the Earth; by Harlow Shapley; 4 Page(s)
January 18, 1919
HARLOW SHAPLEY (1885—1972) was an American astronomer who pioneered new methods to estimate the size of the Milky Way.
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How Old is the World?; Determining the Age of the Earth; by William Harvey McNairn; 2 Page(s)
The Various Answers Offered to the Question by Different Schools of Science
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Concerning the Age of the Earth; Determining the Age of the Earth; by H. V. Hilker; 2 Page(s)
Some of the methods of estimate that have been used, and the results that have been obtained
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The Age-of-the-Earth Debate; Determining the Age of the Earth; by Lawrence Badash; 6 Page(s)
August 1989
LAWRENCE BADASH (1934—2010) was a professor of the history of science at the University of California, Santa Barbara. He was educated at Rensselaer Polytechnic Institute and Yale University, where he received his doctorate in 1964. His primary research interests were the role of scientists in the nuclear arms race and the development of radioactivity and nuclear physics.
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Cover; Determining the Age of the Earth; by Staff Editor; 1 Page(s)
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