We‚ homo sapiens‚ are the sole survivors of a long lineage of hominins. Why we beat our contemporaries is not precisely explained but many theories support the notion that our physical build (endurance running); diet (omnivores of fish‚ insects‚ meat and vegetables); ability to adapt (sewing and tools from animal bones) and innovate in new environments (migration to all regions‚ not just Europe); and‚ intellect for conveying thought and meaning‚ set us apart from our competitor cousins. As we look
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The Cause of the Mass Extinction in the Late Cretaceous Period Dinosaurs first appeared around 245 million years ago‚ and they lived for 180 million years. Then suddenly‚ 65 million years ago they went extinct. Not only did all the dinosaurs die out‚ but also up "to 75% of all marine genera were lost" ("mass extinction"). This leaves scientists wondering about what could have led to this mass extinction in the Cretaceous Period. They have collected evidence from fossils and earth’s geography‚ to
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decide which of three explanations for the extinction of the dinosaurs you like best. Write an explanation of why you like it. Sex: Testes function only in a narrow range of temperature. (Those of mammals hang externally in a scrotal sac because internal body temperatures are too high for their proper function.) A worldwide rise in temperature at the close of the Cretaceous period caused the testes of dinosaurs to stop functioning and led to their extinction by sterilization of males. Drugs: Angiosperms
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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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Human intervention are both advantageous and disadvantageous to the biodiversity of the Felidae family. The way human intervention affects each of the following species of the family are explained below. CHEETAHS Cheetahs are endangered and even extinct in many areas today largely due to human intervention. Human beings have taken over much of the cats’ habitat and killed off the prey that the cheetahs hunt for food. People have also killed many cheetahs directly. By the early 1970’s‚ the fur trade
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Extinction According to Raup (1991‚ p. 3f)‚ “except that the human species still living literally forever‚ it will some time stop to exist. The future of humanity is easy to explain about extinction such a long-term. An estimated 99.9% of all species that ever existed on Earth are already extinct.” There are two distinct ways in which the human species could become extinct: first‚ it is by evolving or transforming into one or more new species or life forms‚ amply particular from what came
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Bemaraha Woolly Lemur Avahi cleesei Description Named after the comedian John Cleese‚ the Bemaraha woolly lemur is a little known Madagascan primate first described in 2005. Like other woolly lemurs‚ this species has thick‚ tightly-curled‚ brown-grey fur‚ and a long tail that is often rolled up against the back. Pale fur on the small‚ rounded head extends from the forehead‚ down towards the nose‚ forming a distinctive triangular shape. The Bemaraha woolly lemur is different from related species
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Introduction According to Haider Rizvi (2007)‚ “We are living beyond the means and capacities of our planet.” The Earth is being damaged badly daily. Humans are destroying their unique shelter. A rapid increase in the human population and an increase in the standard of living have resulted in widespread damage of the environment. People are destroying habitats and reducing the amount of land available for other organisms by building‚ quarrying‚ farming and dumping waste. The more society
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Human Overpopulation Increasing human overpopulation throughout the world is one of the biggest global issues addressed in the 21st century. This concept negatively affects almost every aspect of society: extinction of plants/animals or habitats‚ over use of natural resources‚ climate change‚ and other environmental problems (“As World’s Human”). This continual predicament needs to be corrected by intensified human productive abilities and a global law that will stimulate positive outcomes across
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Overpopulation of Humans The impact of human activity on the environment is catastrophically devastating and destructible. Assisting to that destruction is the increasing number of people that make up the worlds population today. Overpopulation is the condition of giving birth to a number of people living on earth that over exceeds the amount of space‚ resources and land found on our planet. According to reports from the United Nations (2007)‚ “World population is currently growing by approximately
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