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 extraterrestrial object, similar to what caused the dinosaurs' extinction.

Extinction is a paleontological mystery story. Here, the world's foremost authority on the subject provides a fascinating overview of the evidence for and against a whole host of hypotheses concerning this cataclysmic event that unfolded at the end of the Permian.

After setting the scene, Erwin introduces the suite of possible perpetrators and the types of evidence paleontologists seek. He then unveils the actual evidence--moving from China, where much of the best evidence is found; to a look at extinction in the oceans; to the extraordinary fossil animals of the Karoo Desert of South Africa. Erwin reviews the evidence for each of the hypotheses before presenting his own view of what happened.

Although full recovery took tens of millions of years, this most massive of mass extinctions was a powerful creative force, setting the stage for the development of the world as we know it today.

CUSTOMER REVIEWS (Average Customer Rating: 4.5 based on 12 reviews)

Very informative overview of the Permian Mass Extinction

I found this book very easy to read. Mr. Erwin has a sort of sense of humor he adds to the book to take away from any text book monotony you may be afraid of. He is also extremely in depth and explains with seemingly little bias the many proposed possible causes and evidence (or lack of) for this mass extinction. There are also many diagrams and graphs to illustrate much of the pertenant information. I won't get too in depth with the contents, I will just say if you have any interest in the Permian, or any other prehistoric event, I suggest you read it.
October 08, 2007

Interesting topic, expert writer, frustrating book

I wish I could give this book three or four stars. Erwin is an expert in the area of the Permian extinction, and when he tries, he can write well. Unfortunately, he does not seem to try often. There are just too many sentences here that need to be read two or three times before their meaning becomes clear. The meaning of many of the graphics never become clear! And at the end of each chapter, I was unclear about what I had learned, and what I could expect next.

I finally gave up half way through the book. At that point, I was as confused about the Permian extinction as I was at the beginning, and I cannot even say I was confused at a higher level.
March 22, 2007

Perspective on Global Warming

A geologist's view of global warming puts things in perspective. The sky may or may not be falling, but it's happened before.
February 22, 2007

Splendid agnosticism

In Kentucky, there's a museum with a lifesize model of a dinosaur with a saddle on it. This is a hymn in fiberglass to young Earth creationism, the idea that the Universe was created about 6,000 years ago.
It costs $1,500 to become a charter member (family rate) of this museum. A much better investment would be $24.95 for Douglas Erwin's thriller about the Permian extinction.
More than nine-tenths of all species died out 251 million years ago. Erwin, a researcher with the Smithsonian Institution's National Museum of Natural History and the Santa Fe Institute, finds the end-Permian "enigma far more compelling than the end of the dinosaurs," a relatively minor event from 65 million years ago.
For an event that Kentuckians think never happened, the end-Permian event left a lot of debris, of which the most interesting is in China. Until 20 years ago, the paleontological record there was unknown to the outside world.
What the evidence is telling us is difficult to say. Erwin says "Extinction" was "frankly written as a mystery story." In this one, the clever detective does not wrap up all the loose ends on the last page.
Instead, we learn that there are at least seven major theories of what might have happened. These range from a big meteorite to gigantic volcanic eruptions in Siberia to a climatic or biological or geological change that drove oxygen out of the oceans.
The first chapters set the stage. Life was very different in the Permian. There were reefs in warm oceans, and they contained corals, but the corals were only distantly related to those of today and they were not as important as crinoids and lampshells, animals that still exist in out-of-the-way places.
On land, flowering plants had not yet evolved, nor mammals, dinosaurs or saddles. In South Africa's Karoo basin, fossils remain of a fabulous, lost fauna.
There were widespread extinctions on land as well as in the sea during the end-Permian event, but it is hard to say whether the land extinction was as complete as in the sea, where 94 percent of species disappeared in a short time. Erwin's team and their Chinese collaborators have found evidence that it all happened in less than 160,000 years -- maybe a lot less.
It is also not proved that the big land extinction exactly coincided with the sea kill, but it seems likely. The land kill was a whopper, too. This was apparently the only time in history when a mass extinction had any real impact on insects.
Whatever the cause, it did set up the modern world. "Mass extinction is a powerful creative force," says Erwin.
Or did it? As they learn more and more of the details, scientists are also learning to question the easy assumptions of more innocent decades.
Evolutionary biologists are vigorously debating whether the animals and plants that dominated the Permian were already being outcompeted by the early forerunners of modern flora and fauna, or whether they would have maintained their control of resources.
Erwin, splendidly agnostic about this and other debates, lays out the questions but leaves the resolution for some other time. Perhaps not too far in the future. He notes that his 1993 book on the Permian extinction already is out of date in many ways.
In fact, after decades researching the extinction itself, he has now concluded that "understanding the recovery from the extinction poses a far greater intellectual challenge."

November 22, 2006

Some self-aggrandizing here...

It is always gratifying to see popular books about science get rave reviews because we scientists benefit from public enthusiasm about what we do. Erwin has a chatty and disarming style that is a joy to read. Unfortunately, it is a public disservice to distort reality as Erwin has done in this book. In depicting his role in the whodunit, Erwin has liberally embellished his own contributions and those of his colleagues. After proclaiming for years that the extinction was unrelated to the Siberian volcanism, this book now implies that such a relationship was his idea. The whitewashing treatment of his team's blunder in misdating the extinction and related events is worthy of the most guileful politician explaining away some scandalous act.

As long as you don't mind the plethora of factual errors and self-promotional aspects, it is a fine book. Unfortunately, it will not weather history well.
October 17, 2006

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