Extinction: How Life on Earth Nearly Ended 250 Million Years Ago

发育生物学,古生物学

售   价:
321.00
作      者
出  版 社
出版时间
2008年05月01日
装      帧
平装
ISBN
9780691136288
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页      码
320
开      本
8.70 x 6.02 x 0.77
语      种
英文
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图书简介

Some 250 million years ago, the earth suffered the greatest biological crisis in its history. Around 95% of all living species died out--a global catastrophe far greater than the dinosaurs' demise 65 million years ago. How this happened remains a mystery. But there are many competing theories. Some blame huge volcanic eruptions that covered an area as large as the continental United States; others argue for sudden changes in ocean levels and chemistry, including burps of methane gas; and still others cite the impact of an extra

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