Download the fantastic book titled When the Invasion of Land Failed written by George R. McGhee Jr., available in its entirety in both PDF and EPUB formats for online reading. This page includes a concise summary, a preview of the book cover, and detailed information about "When the Invasion of Land Failed", which was released on 22 October 2013. We suggest perusing the summary before initiating your download. This book is a top selection for enthusiasts of the Science genre.
Summary of When the Invasion of Land Failed by George R. McGhee Jr. PDF
The invasion of land by ocean-dwelling plants and animals was one of the most revolutionary events in the evolution of life on Earth, yet the animal invasion almost failed—twice—because of the twin mass extinctions of the Late Devonian Epoch. Some 359 to 375 million years ago, these catastrophic events dealt our ancestors a blow that almost drove them back into the sea. If those extinctions had been just a bit more severe, spiders and insects—instead of vertebrates—might have become the ecologically dominant forms of animal life on land. This book examines the profound evolutionary consequences of the Late Devonian extinctions and the various theories proposed to explain their occurrence. Only one group of four-limbed vertebrates exists on Earth, while other tetrapod-like fishes are extinct. This gap is why the idea of "fish with feet" seems so peculiar to us, yet such animals were once a vital part of our world, and if the Devonian extinctions had not happened, members of these species, like the famous Acanthostega and Ichthyostega, might have continued to live in our rivers and lakes. Synthesizing decades of research and including a wealth of new discoveries, this accessible, comprehensive text explores the causes of the Devonian extinctions, the reasons vertebrates were so severely affected, and the potential evolution of the modern world if the extinctions had never taken place.
Detail About When the Invasion of Land Failed PDF
- Author : George R. McGhee Jr.
- Publisher : Columbia University Press
- Genre : Science
- Total Pages : 345 pages
- ISBN : 0231536364
- Release Date : 22 October 2013
- PDF File Size : 14,6 Mb
- Language : English
- Rating : 4/5 from 21 reviews
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