Why think?

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Jeffrey H. Schwartz

"In upending the conventional wisdom on relationships between apes and humans, Schwartz provides a fresh examination of the fossil record, genetics, and the comparative anatomy and physiology of humans and other living primates. Discussing these topics from a historical, philosophical, and theoretical perspective, he argues that it is the Asian orangutan, not the African chimpanzee, bonobo, or gorilla, that is humankind's closest evolutionary cousin. The result is a challenge to what we think we know about the origins of humans"--Book jacket.

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[edited by] Ken Ashwell

"Australian marsupials represent a parallel adaptive radiation to that seen among placental mammals. This great natural experiment has produced a striking array of mammals with structural and behavioural features echoing those seen among primates, rodents, carnivores, edentates and ungulates elsewhere in the world. Many of these adaptations involve profound evolutionary changes in the nervous system, and occurred in isolation from those unfolding among placental mammals. Ashwell provides the first comprehensive review of the scientific literature on the structure and function of the nervous system of Australian marsupials. The book also includes the first comprehensive delineated atlases of brain structure in a representative diprotodont marsupial (the tammar wallaby) and a representative polyprotodont marsupial (the stripe-faced dunnart). For those interested in brain development, the book also provides the first comprehensive delineated atlas of brain development in a diprotodont marsupial (the tammar wallaby) during the critical first 4 weeks of pouch life"--Provided by publisher.

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Richard Leakey and Roger Lewin

There have been five great extinctions in the long history of life on earth, the most recent 65 million years ago, when all dinosaur species perished in an astonishingly brief period of time. Each of these great extinctions was unimaginably catastrophic - at least 65 percent of all species living vanished in a geological instant; in the Permian extinction, nearly 95 percent of all species were obliterated. The agency for these extinctions, the why, is hotly debated - sudden climate change, asteroids, evolutionary inadequacy - but the patterns are remarkably consistent. Now, as Leakey and Lewin show with inarguable logic based on irrefutable scientific evidence, the sixth great extinction is underway. And this time the cause is beyond dispute: By the lowest estimate, thirty thousand species are wiped out by human agency every year - a rate that matches the patterns of the other five great extinctions with frightening exactitude. As the authors show, such dramatic and overwhelming extinction threatens the entire complex fabric of life on earth, including the species at fault, Homo sapiens. Unless we come to realize the devastating consequence of our rapacious behavior, we will follow the mastodon, the great auk, the carrier pigeon, and our other victims into the oblivion of extinction.

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Marilyn Bailey

Presents differing views of experts on the origins of earth and its creatures. Explores the Bible story, Darwinian theories, fossils, and carbon-dating techniques.