Author: J. D. Macdougall Publisher: Univ of California Press ISBN: 0520261615 Category : Nature Languages : en Pages : 284
Book Description
"A lucid and engaging account of the scientific revolution that changed the way we think about our planet and ourselves."—James Lawrence Powell, author of Grand Canyon and Mysteries of Terra Firma
Author: Doug Macdougall Publisher: Univ of California Press ISBN: 0520933443 Category : Science Languages : en Pages : 285
Book Description
"Radioactivity is like a clock that never needs adjusting," writes Doug Macdougall. "It would be hard to design a more reliable timekeeper." In Nature's Clocks, Macdougall tells how scientists who were seeking to understand the past arrived at the ingenious techniques they now use to determine the age of objects and organisms. By examining radiocarbon (C-14) dating—the best known of these methods—and several other techniques that geologists use to decode the distant past, Macdougall unwraps the last century's advances, explaining how they reveal the age of our fossil ancestors such as "Lucy," the timing of the dinosaurs' extinction, and the precise ages of tiny mineral grains that date from the beginning of the earth's history. In lively and accessible prose, he describes how the science of geochronology has developed and flourished. Relating these advances through the stories of the scientists themselves—James Hutton, William Smith, Arthur Holmes, Ernest Rutherford, Willard Libby, and Clair Patterson—Macdougall shows how they used ingenuity and inspiration to construct one of modern science's most significant accomplishments: a timescale for the earth's evolution and human prehistory.
Author: James Jespersen Publisher: Courier Corporation ISBN: 0486409139 Category : Science Languages : en Pages : 322
Book Description
Clear and accessible introduction to the concept of time examines measurement, historic timekeeping methods, uses of time information, role of time in science and technology, and much more. Over 300 illustrations.
Author: Geoff McNamara Publisher: Springer Science & Business Media ISBN: 038776562X Category : Science Languages : en Pages : 192
Book Description
Pulsars are rapidly spinning neutron stars, the collapsed cores of once massive stars that ended their lives as supernova explosions. In this book, Geoff McNamara explores the history, subsequent discovery and contemporary research into pulsar astronomy. The story of pulsars is brought right up to date with the announcement in 2006 of a new breed of pulsar, Rotating Radio Transients (RRATs), which emit short bursts of radio signals separated by long pauses. These may outnumber conventional radio pulsars by a ratio of four to one. Geoff McNamara ends by pointing out that, despite the enormous success of pulsar research in the second half of the twentieth century, the real discoveries are yet to be made including, perhaps, the detection of the hypothetical pulsar black hole binary system by the proposed Square Kilometre Array - the largest single radio telescope in the world.
Author: Amita Sehgal Publisher: John Wiley & Sons ISBN: 9780471418245 Category : Science Languages : en Pages : 302
Book Description
This text begins with a general introduction to biochemical and biophysical aspects of circadian timing, then proceeds to its essential focus on collating the newest information on molecular mechanisms of circadian rhythms. It includes a chapter on the implications for clinical research on affective disorders, sleep disorders, and the relevance for therapeutic treatment, as well as coverage of multiple oscillators and hormonal rhythms. Sections include: Molecular Control of Circadian Rhythms: Animal Models Molecular Control of Circadian Rhythms: From Cyanobacteria to Plants Circadian Organization in Complex Organisms. Chapter topics include examinations of circadian rhythms in non-mammalian vertebrates, neurospora, and humans.
Author: Martin Jenkins Publisher: ISBN: 9781406323733 Category : Clocks and watches Languages : en Pages : 0
Book Description
What is time? When did we first use it? Does it always work? How do animals tell time? A fun and fascinating look at time from the first calendars and clocks to the digital watches and precise time-keeping methods of today.
Author: Pat Hutchins Publisher: Simon and Schuster ISBN: 1481410725 Category : Juvenile Fiction Languages : en Pages : 32
Book Description
When the hall clock reads twenty minutes past four, the attic clock reads twenty-three minutes past four, the kitchen clock reads twenty-five minutes past four, and the bedroom clock reads twenty-six minutes past four, what should Mr. Higgins do? He can't tell which of his clocks tells the right time. He is in for a real surprise when the Clockmaker shows him that they are all correct!
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Author: J. D. Macdougall
Author: Doug Macdougall
Author: James Jespersen
Author: Geoff McNamara
Author: Amita Sehgal
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Author: Joseph Daniele
Author: Martin Jenkins
Author: Sir Norman Lockyer
Author: Pat Hutchins