More than 200 million years ago, a cataclysmic event known as the Permian extinction destroyed more than 90% of all species and nearly 97% of all living things. Its origins have long been a puzzle for paleontologists, and during the 1990s and the early part of this century a great battle was fought between those who thought that death had come from above and those who thought something more complicated was at work.

Paleontologist Peter D. Ward, fresh from helping prove that an asteroid had killed the dinosaurs, turned to the Permian problem, and he has come to a stunning conclusion. In his investigations of the fates of several groups of mollusks during those extinctions and others, he discovered that the near-total devastation at the end of the Permian was caused by rising levels of carbon dioxide leading to climate change. But it's not the heat (nor the humidity) that's directly responsible for the extinctions, and the story of the discovery of what is responsible makes for an fascinating, globe-spanning adventure.

• We started tracking this book on March 11, 2011.
• This book was $10.99 when we started tracking it.
• The price of this book has changed 185 times in the past 5,427 days.
• The current price of this book is $1.99 last checked 5 hours ago.
• This book is at its lowest price in the past year.
• The lowest price to date was $0.99 last reached on April 7, 2015.
• This book has been $0.99 16 times since we started tracking it.
• The highest price to date was $14.99 last reached on May 13, 2016.
• This book has been $14.99 one time since we started tracking it.

• HistoryScience & MedicineBiology & Nature
• Science & MathEnvironmentWeather
• Science & MathEnvironmentEcology
• Science & MathEarth SciencesEnvironmental Science

• Publication Date: October 13, 2009
• Text-to-Speech: Disabled
• Lending: Disabled
• Print Length: 258 Pages
• File Size: 882 KB