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Ice Age Extinctions Of The Megafauna
1,675 wordsICE AGE EXTINCTIONS OF THE MEGAFAUNA During the last Ice Age before humans arrived, the North American continent belonged to various forms of enormous, fantastic creatures. By the end of the Ice Age, most of these large animals had become extinct. Numerous attempts have been made to explain the disappearance of these animals, but there has yet to be a consensus. Among the theories that have been debated, two are predominant. They are the climatic change theory, and the overkill theory. The clima...
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Endangered Species Human Beings
810 wordsCloning is the production of duplicate copies of genetic materials, cells, or entire multi-cellular living materials. For years cloning had only been a fantasy, but with new scientific research cloning can be very successful. Because there are so many advantages in areas like agriculture, medicine, and biological research in producing genetically identical organisms, artificial cloning has become the focus of attention with scientists today. "At last there is hope of saving endangered species. W...
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000 Years Ago Stone Tools
3,216 wordsTroublesome Questions In 1830 Mr. Rankin tied a rope around a projection out of a rock face in order to lower himself into Wellington Cave (Horton, 1980). The projection turned out to be the bone of a giant extinct marsupial. It was to be the first discovery of a great range of giant marsupials. Were these animals extinct? ? Horton (1980), describes how Leichhart believed that on his journeys to northern Australia he would find Diprotodon still roaming over the land. We now know that he was prob...
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Million Years Ago Mass Extinction
10,014 wordsEarth probably began Extinction Introduction Earth probably began about 4. 5 billion years ago. A history of this life on Earth is recorded in fossil remains and traces of past life. It is a record of evolution for both life and the planet. Life and the planet have co-evolved, with life causing changes to the planet which in turn drive changes in life. The Fossil Record A history of these changes is recorded in the layers or strata of rock laid down over the millions of years, and by changes in ...
Free research essays on topics related to: volcanic eruptions, mass extinction, lava flows, permian extinction, million years ago
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