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Paul S. Martin (born in Allentown, Pennsylvania, 1928 - died in Tucson, Arizona September 13, 2010〔Mari N. Jensen. ''(Paul S. Martin, Pleistocene Extinctions Expert, Dies )''. University of Arizona. Retrieved 2010-09-17. 〕) was a geoscientist at the University of Arizona who developed the theory that the Pleistocene extinction of large mammals worldwide was caused by overhunting by humans. Martin's work bridged the fields of ecology, anthropology, geosciences and paleontology. In 1953 Martin received his bachelor's degree in zoology from Cornell University. In 1953 and 1956 he completed his master's and doctorate programs at the University of Michigan and then proceeded with postdoctoral research at the Yale University and the University of Montreal. He joined the faculty of the University of Arizona in 1957 and worked there until his retirement in 1989.〔 A case of polio, contracted while doing undergraduate field work in Mexico, forced Martin to rely on a cane, which restricted but did not end his field work.〔Alan Weisman, (The World Without Us ), p. 68, Picador, 2007〕 ==Overkill Hypothesis== Martin developed the theory known as “overkill” or the “blitzkrieg model”〔Peter D. Ward, ''(The Call of Distant Mammoths )'', p. 140, Copernicus, 1997〕 based on his early insight that the sudden demise of large Ice Age mammal populations on different continents and at different times coincided with the arrival of humans. He believed that as they migrated from Africa and Eurasia to Australia, the Americas, and the islands of the Pacific, humans rapidly hunted the large animals endemic to each continent to extinction. Martin particularly focused his research on North America, whose late Ice Age fauna rivaled that of Africa today.〔Alan Weisman, The World Without Us, pp 68-83, Picador, 2007〕 There, he theorized, around 11,000 years ago, newly arriving humans hunted North America's Ice Age big game, including ground sloths, camels, mammoths and mastodons, to extinction.〔Amos Esty, Paul S. Martin. ''(An interview with Paul S. Martin )''. Retrieved 2010-09-17. 〕 The theory, summarized in ''Twilight of the Mammoths: Ice Age Extinctions and the Rewilding of America'' (2005) has been widely discussed and remained controversial. Critic Michael Fosha wrote that although Martin attempted to discuss and debunk alternative explanations of the extinction, he did not adequately examine mainstream theories like changes in climate and vegetation. According to Fosha, Martin presented a vivid account of prehistoric people's assault on nature "with the efficiency of a German panzer division" but Fosha felt that his views on archaeology were inaccurate. However, Fosha wrote that the book presents "excellent data on the Southwest" and deserves serious attention for it.〔Michael Fosha (2006). ''(Book Review of Twilight of the Mammoths: Ice Age Extinctions and the Rewilding of America by Paul S. Martin )''. Great Plains Research: A Journal of Natural and Social Sciences. University of Nebraska - Lincoln. Vol. 16 No.2, 2006. pp. 204-205. 〕 Martin sometimes faced criticism from archaeologists and paleontologists who claimed earlier dates for human arrival in the Americas or later dates for certain extinct animals than the overkill theory would suggest. Martin maintained that such claims were the result of faulty scientific analysis and pointed out that no such dates had yet been independently verified. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Paul S. Martin」の詳細全文を読む スポンサード リンク
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