Peter D. Ward - Böcker

Peter Ward, a distinguished paleontologist and author of five trade books, recreated, in dramatic and colorful language, the global environment of the end of the last great Ice Age. The last of the great woolly mammoths existed on Wrangel Island thousands of years after their extinction elsewhere on earth. Ward examines competing theories about the courses of the great extinction and considers in detail the role of human settlements on these events.

The sweeping diversity of complex life on Earth, Ward and Brownlee argue, evolved out of an extraordinary set of physical conditions and chance events that would be extremely hard to duplicate--though not impossible. Many planets throughout the vastness of the Universe may be teeming with microbial life, but advancement beyond this stage is very rare. Everyone with an interest in the possible extent of life in the Universe and the nature of life's evolution on our own planet will be fascinated by Rare Earth. "...likely to cause a revolution in thinkinbg..."--The New York Times "...[the book] has hit the world of astrobiologists like a killer asteroid..."--Newsday (New York) "...a sobering and valuable perspective..."--Science "...a startling new hypothesis..."--Library Journal "...Peter Ward and Donald Brownlee offer a powerful argument..."--The Economist "...provocative, significant, and sweeping..."--Northwest Science & Technology "...a stellar example of clear writing..."--American Scientist "...well thought out and intriguing..."--Icarus "...a pleasure for the rational reader ...what good books are all about..."--The Associated Press

The time machine is one of the classic devices of science fiction, a source of endless wonder and inventiveness. In a book that transfers that sense of wonder and inventiveness to the realm of nonfiction, Peter Ward shows that paleontologists do indeed use time machines to probe the deep geological past, and that both the machines and the people using them come in a fantastic variety of types. Sometimes the time machine is as simple as a rock hammer or as humble as a magnifying glass; other times it is an esoteric piece of equipment such as a mass spectrometer. Always, the most important element is the imagination of the scientists willing to take the scientific and creative risks of plumbing the distant past of our planet and its great bestiary. In 10 separate essays united by this common theme, Time Machines prowls the world of steamy Mesozoic days and fetid Paleozoic nights to rediscover the grace and beauty of Earth's faraway paSt.

Just 12,000 years ago - at the height of the last Ice Age - saber-toothed tigers, giant ground sloths, camels, hippos and the great herds of proboscideans: giant mastodons and mammoths, extinct relatives of the elephant, roamed the land where skyscrapers now stand. Why are these splendid creatures no longer with us? This compelling book explores the reasons for these extinctions and provides a tour of mass extinctions throughout earth's history, including the great comet crash that killed off the dinosaurs. Brilliantly written, The Call of Distant Mammoths is an engaging exploration of the history of life and the importance of humanity as an evolutionary force.

I n modem times, science has brought the past-and so many of its creatures-back to life via intellectual inquiry, application of the scientific method, and some extraordinary technology that has recently been devel­ oped. The wonder of the process is that such a rich and vivid understanding of the deep past has been generated from such scanty evidence: broken bones, lithified shells, fossil leaves, and even simple layered rocks. The sci­ entists who have contributed to this work have woven rich tapestries of an­ cient times, and their weaving, which is an adventure in itself, is the subject of this book. It is as if true time machines existed, enabling us to retreat through time's mists into the past, to examine the then-living as though liv­ ing still, to visit ancient worlds and reconstruct the lives their denizens led. vii TIME MA[HINES The past tantalizes us; it is part of our nature to seek clues about an­ cient times and our origins. Yet the past is far more than just some moment in time. In our own lives, for instance, it is also place, people (and other liv­ ing things), and history. Take the first day of school: the desks and posters, the windows and chalkboards, the people who left us there, the people we met. So, too, for paleontologists and archeologists is the deep past a conver­ gence of time, place, inhabitants, and their history or biological interactions.