Several mass extinctions have occurred during the Earth ’s history. The Cretaceous Tertiary Boundary (K-T) Extinction caused the loss of at least three-quarters of all species known at that time including the dinosaurs. The cause of this mass extinction is a controversial subject among scientists but the fossil evidence of it ’s occurrence is abundant. INTRODUCTION The K-T Extinction occurred 65 million years ago. Many species perished in that extinction. Today evidence for this extinction can be
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There are several reasons why lemurs are facing extinction; lemurs are being put at risk by deforestation‚ hunting‚ and climate change (Dunham et al.‚ 2008). Deforestation in Madagascar is especially significant in affecting lemurs. Deforestation leads to habitat loss and habitat fragmentation‚ which may have negative consequences for lemurs (Craul et al.‚ 2009). Lemurs are threatened by hunting because they are a food source for locals. There have been efforts by the government in Madagascar to
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To have a better indication of what actually happens during anoxic events‚ the Cenomanian-Turonian boundary event will be discussed as a case study. During this time period‚ two anoxic extinction events happened. The earth’s oceans lacked oxygen for nearly half a million years‚ causing the extinction of approximately 27 percent of the marine invertebrates (Turgeon‚ 2008 p. 16). As expected‚ the global environmental disturbance increased atmospheric and oceanic temperatures. A possible cause was
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trust related to the process‚ its current state and predictions for the future. 1- Earth enters sixth extinction phase with many species – including our own – labelled ’the walking dead’ by Rose Troup Buchanan. 2- Accelerating extinction risk from climate change by Mark C. Urban. 2- Write a summary for each article that states the conclusions and recommendations. 2a- First article: According to Buchanan‚ all species on the earth are entering the sixth great extinction event. A report authored by scientists
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Plants Extinctions causes and effects on human Nowadays ‚ animal extinction is a broad issue‚ one that involves the habitats and environments where other species live and interact with one another . Only a minority of people are concerned with extinction in today痴 society‚ while others might argue that it is a small problem because we are beyond the point of evolution and thus don’t really need to rely on other animals at all. According to statistics of scientific research‚extinction is
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I am writing in response to your request that I analyze Stewart Brand’s “The Case for De-Extinction: Why We Should Bring Back the Woolly Mammoth” and make a recommendation for or against publication in The Shorthorn. I have considered the rhetorical appeals of Brand’s piece and determined that a large majority of students would find this to be unappealing due to the large amount of Christians‚ Catholics‚ Muslims‚ and other religious groups on campus‚ so therefore‚ it should not be published. This
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Dear Mr Clarkson‚ I have recently read ’Stuff The Tiger – Long Live Extinction’ with interest‚ and write to inform you of the failings in your article. Although there may be some element of truth in your main point‚ that we shouldn’t care about animals becoming extinct‚ the confusing way that you argue it prevents me from considering it seriously. There are a number of serious flaws both in how you present your argument and in the points that you make‚ and I hope to outline these to you in my letter
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paper will tell you what a Green sea turtle is and what is causing they’re extinction. First‚ it will tell how and why they are endangered. Secondly‚ it will tell where they live. Thirdly‚ it will tell where they are born and what they eat. Finally‚ it will tell what they look like. The Green sea turtles are endangered for many reasons. One is that fishing crews are accidentally capturing them. Another‚ is that they have limited space to breed. The National Wildlife Federation said‚ "Bycatch of
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“De-extinction Probably isn’t Worth it”. This is the name of an article by Sarah Zielinski. I completely understand what she is talking about in her text‚ and I agree with her. De-extinction isn’t worth it mainly because it would take attention from other research‚ harm living creatures‚ and most of their habitats and food are gone. If we brought back extinct animals‚ it would take a lot of funds and research‚ causing us to forget about other research projects. In Mrs. Zielinski’s article she told
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The Great White Shark‚ immortalized by the Hollywood film Jaws‚ is at the midst of an international controversy. The shark‚ despite its notoriety‚ is in danger of extinction. A conflict over the fate of these sharks has existed for decades‚ but with recent attacks the debate has come to the forefront. The environmental conflict over the Great White Shark has yet to reach a conclusion‚ as many factors exist that hinder resolution possibilities. The purpose of this paper is to provide background information
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