Requiring only basic algebra and trigonometry, the new edition is notable for its readability, learning features and numerous full-color photos and illustrations. A systems approach is used to cover state-of-the-art communications technologies, to best reflect current industry practice. This edition contains greatly expanded and updated material on the Internet, cell phones, and wireless technologies. Practical skills like testing and troubleshooting are integrated throughout. A brand-new Laboratory & Activities Manual provides both hands-on experiments and a variety of other activities, reflecting the variety of skills now needed by technicians. A new Online Learning Center web site is available, with a wealth of learning resources for students. An Instructor Productivity Center CD-ROM features solutions to all problems, PowerPoint lessons, and ExamView test banks for each chapter.

    It is the root of our existence, supporting our feet, our farms, our cities. This fascinating yet disquieting book finds, however, that we are running out of dirt, and it's no laughing matter. An engaging natural and cultural history of soil that sweeps from ancient civilizations to modern times, Dirt: The Erosion of Civilizations explores the compelling idea that we are—and have long been—using up Earth's soil. Once bare of protective vegetation and exposed to wind and rain, cultivated soils erode bit by bit, slowly enough to be ignored in a single lifetime but fast enough over centuries to limit the lifespan of civilizations. A rich mix of history, archaeology and geology, Dirt traces the role of soil use and abuse in the history of Mesopotamia, Ancient Greece, the Roman Empire, China, European colonialism, Central America, and the American push westward. We see how soil has shaped us and we have shaped soil—as society after society has risen, prospered, and plowed through a natural endowment of fertile dirt. David R. Montgomery sees in the recent rise of organic and no-till farming the hope for a new agricultural revolution that might help us avoid the fate of previous civilizations.

    Denise Herzing began her research with a pod of spotted dolphins in the 1980s. Now, almost three decades later, she has forged strong ties with many of these individuals, has witnessed and recorded them feeding, playing, fighting, mating, giving birth and communicating. Dolphin Diaries is an account of Herzing’s research and her surprising findings on wild dolphin behavior, interaction, and communication. Readers will be drawn into the highs and lows—the births and deaths, the discovery of unique and personalized behaviors, the threats dolphins face from environmental changes, and the many funny and wonderful encounters Denise painstakingly documented over many years. This is the perfect book for anyone who loves these incredibly versatile and intelligent creatures and wants to find out more than the dolphin show at the zoo can offer. Herzing is a true pioneer in her field and deserves a place in the pantheon of naturalists and scientists next to Dian Fossey and Jane Goodall.

    This gloriously illustrated volume provides comprehensive college-level information about birds and their environments in a style accessible to nonscientists and teachers the world over.The "Handbook of Bird Biology" covers all major topics, from anatomy and physiology to ecology, behavior, and conservation biology. One full chapter addresses vocal communication and is accompanied by a CD of bird vocalizations. Produced by the Cornell Laboratory of Ornithology's world-renowned Macaulay Library of Natural Sounds, the CD illustrates key elements of bioacoustics.The book's text was written by 12 leading ornithologists and illustrated by respected photographers and acclaimed artist John Schmitt. It includes an extensive glossary and index, a list of the common and scientific names of all birds mentioned in the text, author profiles, suggested readings following each chapter, and a complete reference section.The "Handbook" serves as the backbone of the Lab's popular Home Study Course in Bird Biology, a self-paced course that can be taken from anywhere in the world, by anyone with a serious interest in birds who would like guidance from professional ornithologists. Comprehensive and readable guide covering all major topicsFree CD of bird vocalizations enclosedExtensive glossary and indexList of all common and scientific namesSuggested readingsComplete reference sectionCompanion to the Cornell Laboratory of Ornithology's popular Home Study Course in Bird Biology

    Her reward for the grueling work of rescuing birds—such as feeding baby hummingbirds every twenty minutes all day long—is her empathy with them and the satisfaction of knowing the world is a birdier and more beautiful place. The Bluebird Effect is about the change that's set in motion by one single act, such as saving an injured bluebird—or a hummingbird, swift, or phoebe. Each of the twenty five chapters covers a different species, and many depict an individual bird, each with its own personality, habits, and quirks. And each chapter is illustrated with Zickefoose's stunning watercolor paintings and drawings. Not just individual tales about the trials and triumphs of raising birds, The Bluebird Effect mixes humor, natural history, and memoir to give readers an intimate story of a life lived among wild birds.

    The distressing decline of sea turtles in Pacific waters and their surprising recovery in the Atlantic illuminate what can go both wrong and right from our interventions, and teach us the lessons that can be applied to restore health to the world's oceans and its creatures. As Carl Safina's compelling natural history adventure makes clear, the fate of the astonishing leatherback turtle, whose ancestry can be traced back 125 million years, is in our hands.Writing with verve and color, Safina describes how he and his colleagues track giant pelagic turtles across the world's oceans and onto remote beaches of every continent. As scientists apply lessons learned in the Atlantic and Caribbean to other endangered seas, Safina follows leatherback migrations, including a thrilling journey from Monterey, California, to nesting grounds on the most remote beaches of Papua, New Guinea. The only surviving species of its genus, family, and suborder, the leatherback is an evolutionary marvel: a "reptile" that behaves like a warm-blooded dinosaur, an ocean animal able to withstand colder water than most fishes and dive deeper than any whale.In his peerless prose, Safina captures the delicate interaction between these gentle giants and the humans who are finally playing a significant role in their survival.

    Sometimes grizzlies kill people, and in exceptionally rare cases they even eat them. Those incidents are the focus of this book because that's what makes bears so interesting, such a huge part of our culture and our collective imagination.

    It includes: Two full-length exams that follow the content and style of the new AP exam All test questions answered and explained An extensive review covering all AP test topics Hundreds of additional multiple-choice and free-response practice questions with answer explanations

    They attracted followers ranging from Thomas Jefferson, who laid out mastodon bones on the White House floor, to twentieth-century doctors who used their knowledge of new species to conquer epidemic diseases. Acclaimed science writer Richard Conniff brings these daredevil "species seekers" to vivid life. Alongside their globe-spanning tales of adventure, he recounts some of the most dramatic shifts in the history of human thought. At the start, everyone accepted that the Earth had been created for our benefit. We weren't sure where vegetable ended and animal began, we couldn't classify species, and we didn't understand the causes of disease. But all that changed as the species seekers introduced us to the pantheon of life on Earth—and our place within it.

    The prairies are the heartland of the continent, a vast, windswept plain that flows from Alberta south to Texas and from the Rockies east to the Mississippi River. This is big sky country, and until recently, one of the richest and most magnificent natural grasslands in the world. Today, however, the North American prairies are among the most altered environments on Earth. Thorough, detailed, and scientifically up-to-date, Prairie: A Natural History provides a comprehensive, nontechnical guide to the biology and ecology of this fabled environment, offering a view of the past, a vision for the future, and a clear focus on the present. Sidebars throughout highlight various grasslands species, tell fascinating natural history and conservation stories, and present the traditional Native American view of the prairie and its inhabitants.

    Yet we hardly know them, not even the ones we’re closest to: those that eat our food, share our beds, and live in our homes. Organizing his book alphabetically, Hugh Raffles weaves together brief vignettes, meditations, and extended essays, taking the reader on a mesmerizing exploration of history and science, anthropology and travel, economics, philosophy, and popular culture. Insectopedia shows us how insects have triggered our obsessions, stirred our passions, and beguiled our imaginations.From the Trade Paperback edition.

    Mastering the fat hormone leptin is the single most important factor in preventing obesity, diabetes, and heart disease. The Leptin Diet contains five simple lifestyle guidelines to get the hormone leptin into balance for permanent weight loss, increased energy, and optimum health. What is Leptin? Fat cells produce the powerful hormone leptin, a primary force instructing metabolism, weight loss, and hormone balance. Leptin communicates directly to your brain, telling the brain how much fat is in storage. It controls appetite, energy, and metabolic rate. Leptin problems are the primary reason for food cravings, overeating, faulty metabolism, the obsession with food, and heart disease. Read The Leptin Diet and notice the difference!

     From the Aztec plumed serpent to the Christian dove to Plato's vision of the human soul growing wings, religion and philosophy use birds to represent our aspirational selves. Winged creatures appear in mythology and folk tales, and in literature by writers as diverse as Ovid, Thoreau, and T. S. Eliot. They've been omens, allegories, and guides; they've been worshipped, eaten, and feared. Birds figure tellingly in the work of such nature writers as Gilbert White and Peter Matthiessen, and are synonymous with the science of Darwin.Gibson spent years collecting this gorgeously illustrated celebration of centuries of human response to the delights of the feathered tribes. The Bedside Book of Birds is for everyone who is intrigued by the artistic forms that humanity creates to represent its soul.

    Bringing to bear a lifetime's immersion in his native landscape and more than twenty years as a professional nature writer, Crumley questions much of the written evidence on the plight of the wolf in light of contemporary knowledge and considers the wolf in today's world, an examination that ranges from Highland Scotland to Devon and from Yellowstone in North America to Norway and Italy, as he pursues a more considered portrait of the animal than the history books have previously offered.Within the narrative, Crumley also examines the extraordinary phenomenon of wolf reintroductions, physically transforming the landscapes in which they live that even the very colours of the land change under the influence of teeming grasses, flowers, trees, butterflies, birds, and mammals that flourish in their company. Crumley makes the case for their reintroduction into Scotland with all the passion and poetic fervour that has become the hallmark of his writing over the years. This is an elegant, erudite and imaginative account that readdresses the place of the wolf in modern Scotland.

    And they weren't just in one place. There was a global pattern to them. This pattern showed a lost science and technology. That's when he knew someone had to speak up. This content was of tremendous value.-MACHINERY: Did you know that the Egyptians bored into granite rock with drills that turned 500 times faster than modern power drills?-ANCIENT AMERICA: Did you know that a Chinese mapping survey of North America in 2200 BC described a sunrise over the Grand Canyon, black opals and gold nuggets in Nevada, and seals frolicking in San Francisco Bay?This is the most amazing archaeology book you'll ever see!Dead Men's Secrets is an assemblage of astonishing discoveries.....A lost super science emerges from the sea floor, jungle and desert sands of our planet... over 1,000 forgotten secrets. It will SHOCK you. SEE this world as you've never seen it before. DISCOVER answers you never had. GAIN a new enjoyment. HAVE FACTS at your fingertips to amaze your friends.International explorer, archaeologist and author Jonathan Gray has traveled the world to gather data on ancient mysteries. He has penetrated some largely unexplored areas, including parts of the Amazon headwater. The author has also led expeditions to the bottom of the sea and to remote mountain and desert regions of the world. He lectures internationally.