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Discusses the impact of humans on the extinction of animals, focusing particulary on mammoths in the Ice Age, but also including mass extinctions throughout history, such as marsupial lions and giant kangaroos in Australia, the giant moa in New Zealand, and various prehistoric animals in North America, all of which followed the spread of the first humans in those regions.
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In 1980 Nobel Laureate Luis Alvarez announced his theory of the dinosaurs final demise: a gigantic meteorite crashed into the earth and raised a cloud of dust that caused darkness for years, suppressing photosynthesis, which impeded plant growth, and eventually starved the dinosaurs. This idea exploded into common awareness with almost unprecedented speed, and was instantly embraced by the media and the public. Almost without question, it quickly...
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Today the world faces the prospect of a devastating mass extinction, as species disappear at a rate that is many times faster than at any previous time in the earth's history. Finding ways to preserve the planet's rich variety of species is the challenge being taken up by conservation biologists, scientists who use their knowledge of ecology, genetics, and population dynamics to develop strategies for conserving biodiversity based on scientific principles....
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"The last documented sighting of the Ivory-billed Woodpecker - one of the rarest and most intriguing animals in the world - was noted over 50 years ago. Long thought to be extinct, the 2005 announcement of a sighting in Arkansas sparked tremendous enthusiasm and hope that this species could yet be saved. But the subsequent failure of a massive search to relocate Ivorybills in Arkansas made hope for the species' revival short-lived." "Here, noted ornithologist...
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"Science is not a democracy, and there is no room for political compromise," writes rankel in reference to the raging debate over what caused the extinction of the dinosaurs. In one camp are the catastrophists, led by the discoveries of Walter and Louis Alvarez, who believe that a meteor impact was the cause; in the opposite corner, led by Courtillot (geophysics, Univ. of Paris), are the gradualists, who believe that dinosaur extinction was caused...
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"This book shows us the face of Earth sixth great mass extinction, revealing that this century is a time of darkness for the world birds and mammals. In The Annihilation of Nature, three of today most distinguished conservationists tell the stories of the birds and mammals we have lost and those that are now on the road to extinction. These tragic tales, coupled with eighty-three color photographs from the world leading nature photographers, display...
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Describes the Eocene-Oligocene extinctions, an important turning-point in Earth history approximately 40 million years ago, when the first signs of Antarctic glaciation appeared. The text relates how, during a period of global cooling, the planet's climate and vegetation changed dramatically.
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Discusses the effect of changing oxygen levels in Earth's atmosphere on evolution and mass extinctions, and presents the theory that saurischian dinosaurs were able to weather two mass extinctions because of a new, more efficient respiratory system, which was in turn inherited by their descendants the birds.
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Scientists uncover physical evidence in a comprehensive look at how the Chicxulub Crater may have been ground zero for an asteroid that put an end to great creatures that once roamed the Earth. The discovery of the giant Chicxulub impact crater, buried off the coast of Mexico, unveiled the solution to one of Earth's greatest mysteries-what killed the dinosaurs. Scientists uncovered physical evidence to explain the mass extinction that rocked the earth...
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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...
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