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Luis and Walter Alvarez
Luis
(1911-1988)
and Walter Alvarez
(1940-)
were a father and son team
who publicized that a layer of iridium (a rare element that mostly comes
from asteroids) rich clay,
had been found worldwide at rocks marking the ending of the
Cretaceous period
(the K-T boundary). This iridium layer is supportive of the
asteriod impact extinction
theory.
Previously, Luis Alvarez had won a Nobel Prize
(1968)
for his other work
on subatomic physics.
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Alphascript Publishing
Paperback (120 pages)
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Cretaceous¿Tertiary extinction event. K¿T boundary, Alvarez hypothesis, Chicxulub crater, Shiva crater, Deccan Traps, Ordovician¿Silurian extinction event, Late Devonian extinction, Permian¿Triassic extinction event, Triassic¿Jurassic extinction event, Extinction event, Cretaceous |
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By Walter Alvarez
Princeton University Press
Paperback (216 pages)
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Click Here | - ISBN13: 9780691131030
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Product Description:
Sixty-five million years ago, a comet or asteroid larger than Mt. Everest slammed into the Earth, causing an explosion equivalent to the detonation of a hundred million hydrogen bombs. Vaporized impactor and debris from the impact site were blasted out through the atmosphere, falling back to Earth all around the globe. Terrible environmental disasters ensued, including a giant tsunami, continent-scale wildfires, darkness, and cold, followed by sweltering greenhouse heat. When conditions returned to normal, half the genera of plants and animals on Earth had perished. This horrific story is now widely accepted as the solution to a great scientific murder mystery what caused the extinction of the dinosaurs? In T. rex and the Crater of Doom, the story of the scientific detective work that went into solving the mystery is told by geologist Walter Alvarez, one of the four Berkeley scientists who discovered the first evidence for the giant impact. It is a saga of high adventure in remote parts of the world, of patient data collection, of lonely intellectual struggle, of long periods of frustration ended by sudden breakthroughs, of intense public debate, of friendships made or lost, of the exhilaration of discovery, and of delight as a fascinating story unfolded. Controversial and widely attacked during the 1980s, the impact theory received confirmation from the discovery of the giant impact crater it predicted, buried deep beneath younger strata at the north coast of the Yucatán Peninsula. The Chicxulub Crater was found by Mexican geologists in 1950 but remained almost unknown to scientists elsewhere until 1991, when it was recognized as the largest impact crater on this planet, dating precisely from the time of the great extinction sixty-five million years ago. Geology and paleontology, sciences that long held that all changes in Earth history have been calm and gradual, have now been forced to recognize the critical role played by rare but devastating catastrophes like the impact that killed the dinosaurs. |
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Island Press
Paperback (461 pages)
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Endangered Species Recovery presents case studies of prominent species recovery programs in an attempt to explore and analyze their successes, failures, and problems, and to begin to find ways of improving the process. It is the first effort to engage social scientists as well as biologists in a wide-ranging analysis and discussion of endangered species conservation, and provides valuable insight into the policy and implementation framework of species recovery programs. The book features a unique integration of case studies with theory, and provides sound, practical ideas for improving endangered species policy implementation. |
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By Luis W Alvarez
National Academy of Sciences
Unknown Binding (59 pages)
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By Leslie Hutchinson
Gale
Digital (2 pages)
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This digital document is an article from Science and Its Times, brought to you by Gale®, a part of Cengage Learning, a world leader in e-research and educational publishing for libraries, schools and businesses. The length of the article is 599 words. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser. The histories of science, technology, and mathematics merge with the study of humanities and social science in this interdisciplinary reference work. Essays on people, theories, discoveries, and concepts are combined with overviews, bibliographies of primary documents, and chronological elements to offer students a fascinating way to understand the impact of science on the course of human history and how science affects everyday life. Entries represent people and developments throughout the world, from about 2000 B.C. through the end of the twentieth century. |
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