Whenyou upgrade to Extra Class, you gain access to the entire Amateur Radio frequency spectrum. Ues this book to ace the top-level ham radio licensing exam. Our expert instruction will lead you through all of the knowledge you need to pass the exam: rules, specific operating skills and more advanced electronics theory.

    Thanks largely to YouTube clips posted by the sloth orphanage in Costa Rica, sloths have attracted a vast audience of admirers. Instead of seeing them as ridiculous anachronisms of which we know little, they have turned into creatures considered by many to be the most endearing on earth.Over much the same period, scientific investigations have also changed our view of sloths. No longer are they seen as total misfits in the modern world but, in the words of one specialist sloth investigator, they are 'masters of an alternative lifestyle'.In this wonderfully entertaining celebration of this most unique of creatures, William Hartston reveals the fascinating history of the sloth, from the prehistoric ground sloth to modern pygmy sloths in Panama, explores the current state of the science of sloths and reveals the truth behind sloth behaviour.

    They unearthed a treasure trove of Cretaceous dinosaurs and mammals, including several new species, that has already helped to reshape our understanding of the dinosaur age. In Dinosaurs of the Flaming Cliffs, team leader Michael Novacek, Provost of Science of the American Museum of Natural History and Curator of Vertebrate Paleontology, re-creates the day-to-day drama of field exploration over the past six years in the Gobi and recounts his and his colleagues' historic discoveries, reported in front-page headlines across the world. In a remarkable narrative that interweaves expedition chapters with in-depth scientific discussions on the nature and importance of the fossil record, Novacek takes us on a journey that explores the very nature of scientific inquiry and dinosaur research.

    These were the animals on the sick list with which Oliver Graham-Jones was presented on his first day as veterinary officer of London Zoo. It was 1950, and the care of wild animals in zoos was in its infancy. Previously sick animals had been placed in the care of their keepers, kept from public view, and if they didn't respond to traditional medications allowed to pass quietly away. But Oliver was to change all this. A pioneer of many of the techniques now used by vets around the world, he was instrumental in building the first animal hospital, and in moving London Zoo away from its Victorian past into the high-tech world of modern veterinary medicine. In Zoo Tails, he tells us about some of the animals he cared for: what it felt like when he was faced with an escaped bear or an injured elephant; and what he did when called upon to perform a colostomy on a python, or when he was asked to fit one of the ravens in the Tower of London with a wooden leg. If a dangerous animal escaped or required urgent medical attention, Oliver Graham-Jones was always on hand, ready for any eventuality. Frequently describing himself as quaking with fear, he

    In this book the Dutchers reflect on the virtues they observed in wolf society and behavior. Each chapter exemplifies a principle, such as kindness, teamwork, playfulness, respect, curiosity, and compassion. Their heartfelt stories combine into a thought-provoking meditation on the values shared between the human and the animal world. Occasional photographs bring the wolves and their behaviors into absorbing focus.

    He went directly from high school in Brooklyn to a job at the Reptile House at the Bronx Zoo, where he stayed for more than thirty years, eventually becoming superintendent of reptiles. He later became curator of the Central Park Zoo, and continues to work with law enforcement as a forensic specialist in the fight to stop illegal importation and slaughter of reptiles for the luxury exotic-leather industry. (His effectiveness at this would earn him the moniker “The Bald-Headed Snake Keeper in the Bronx.â€) You Belong in a Zoo! presents the amazing experiences Brazaitis has had in more than four decades of working with wild animals.Enlightening, funny, and often outrageous, You Belong in a Zoo! is a fascinating behind-the-scenes look at zoos, animal people, and some of nature’s most extraordinary creatures.

    It is a book of wilderness adventure, it is an education in the ingenuities of wilderness housekeeping, filled with practical details about making do, building and rebuilding, gardening for fun and for food, even advice about getting away from getting-away-from-it-all.

    The story starts in earnest 3.8 billion years ago, with the earliest-known form of life on Earth, a bacteria that still exists today, and journeys through action-packed millennia, charting the appearance of new life forms as well as devastating extinction events. Of course, the ever-popular and endlessly intriguing dinosaurs feature large, but Prehistoric Life gives you the whole picture, and the plants, invertebrates, amphibians, birds, reptiles, and mammals that are the ancestors of today's species also populate its pages, making this book unprecedented in its coverage of prehistory. Specially commissioned artworks use cutting-edge technology to render species in breathtakingly realistic fashion, with astonishing images of prehistoric remains, such as skeletons and fossils, to complete the story. To put all the evidence in context, the concept of geological time is explored, as is the classification of species and how the evidence for their evolution is preserved and can be deciphered.New technologies have brought new life to inanimate fossils. CT scanning, for example, unlocks a 3D image of a plant or animal from a piece of rock, which can then be viewed from all angles revealing never-before-seen details. From this researchers can fill in missing pieces and even simulate how an animal might have moved. Panels explore these and numerous other scientific techniques for recovering, dating, and reconstructing, as well as profiling individuals, key excavations and discoveries, and some of the unique anatomical features that nature has developed over the course of time.The last section of the book looks at the development of humans and the eventual rise to dominance of Homo sapiens, exploring not only their changing anatomy as revealed by the fossils but also the evidence for culture and society as evidenced by extraordinary cave paintings and intricately worked tools.In combination, the stunning visuals, captivating, authoritative text, and comprehensive approach make Prehistoric Life a fascinating and revealing encyclopedia that will appeal to the whole family.TABLE OF CONTENTS1. LIVING PLANET (38 pp)Foundations of a living planet. The Earth's structure. Plate tectonics, formation of oceans and continents.Changing climate. factors that contribute to climate change, how those can be seen in the geological record, and how that has affected life on Earth.Reconstructing the past. Using the present to understand the past (rocks and the rock cycle, layers of rock and dating)Fossils. Types of fossils, how they form, reconstructing the past from them (digging up, analysis), reconstructing past environments, dating using fossils.Geological timescale. Explanation of geological time.Life on Earth. What is life? Natural selection, DNA, molecular clocks, mass extinctions.Timeline of Evolution. Broad-scale look at major evolutionary markers through time.Classification. How we classify living organisms. The kingdoms of life.2. ON EARTH (398 PP) This chapter will be organized so that pages can be removed to leave a section of 360pp.his consists of a catalog divided into geological periods. Each period introduction covers the conditions on Earth at the time (geology and climate) and includes a chart showing the evolution of the main forms of life. The subsequent catalog entries are organized into groups: Microscopic life; Plants and Fungi; Invertebrates; and Vertebrates, with each having an introduction detailing the main evolutionary developments within the group.Archean 3.8-2.5 billion years ago (4pp)Period introduction. (1p)Archean life intro - (1p) the rise of life. Biology of cells; prokaryotes, cyanobacteria, stromatolites.Catalog of species.Proterozoic 2.5 billion-543 mya (6pp)Period introduction. (2pp)Microscopic life intro. (1p)Catalog of species. (1p)Invertebrates intro. (1p)Catalog of species. (1p)Cambrian 543-490 mya (20pp)Period introduction (4pp)Microscopic life intro. (1p)Catalog of species. (3pp)Invertebrates intro. (2pp)Catalog of species. (8pp)Vertebrates intro. (1p)Catalog of species. (1p)Ordovician 490-443 mya (14pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species.(1p)Invertebrates intro. (1p)Catalog of species. (3pp)Vertebrates intro. (1p)Catalog of species. (1p)Silurian 443-417 mya (20pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (1p)Invertebrates intro. (1p)Catalog of species. (7pp)Vertebrates intro. (1p)Catalog of species. (3p)Devonian 417-354 mya (34pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (7pp)Invertebrates intro. (1p)Catalog of species. (7pp)Vertebrates intro. (2p)Catalog of species. (10pp)Carboniferous 354-290 mya (38pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (2pp)Catalog of species. (8pp)Invertebrates intro. (1p)Catalog of species. (9pp)Vertebrates intro. (2pp)Catalog of species. (10pp)Permian 290-248 mya (26pp)Period introduction. (Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (3pp)Invertebrates intro. (1p)Catalog of species. (7pp)Vertebrates intro. (1p)Catalog of species. (7pp)Triassic 248-206 mya (30pp)Period introduction. (Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (5pp)Invertebrates intro. (1p)Catalog of species. (3pp)Vertebrates intro. (1pp)Catalog of species. (13pp)Jurassic 206-144 mya (56pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (5pp)Invertebrates intro. (1p)Catalog of species. (9pp)Vertebrates intro. (2pp)Catalog of species. (24pp)Cretaceous 144-65 mya (54pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (2pp)Catalog of species. (10pp)Invertebrates intro. (1p)Catalog of species. (9pp)Vertebrates intro. (2pp)Catalog of species. (24pp)Paleogene 65-23.8 mya (34pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (6pp)Invertebrates intro. (1p)Catalog of species. (6pp)Vertebrates intro. (2pp)Catalog of species. (12pp)Neogene 23.8-1.8 mya (32pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (6pp)Invertebrates intro. (1p)Catalog of species. (7pp)Vertebrates intro. (1p)Catalog of species. (10pp)Quaternary 1.8 mya-Present (26pp)Period introduction. (4pp)Microscopic life intro. (1p)Catalog of species. (1p)Plants and fungi intro. (1p)Catalog of species. (Invertebrates intro. (1p)Catalog of species. (5pp)Vertebrates intro. (1p)Catalog of species. (8pp)3. THE RISE OF HUMANS (44PP)Timeline of human evolution.Coverage of: Sahelanthropus tchadensis, Orrorin tugenesis, Ardipithecus kadabba, Ardipithecus ramidus, Australopithecus anamensis, Australopithecus afarensis, Kenyanthropus platyops, Australopithecus africanus, Australopithecus aethiopicus, Australopithecus garhi, Homo habilis, Homo rudolfensis, Paranthropus boisei, Homo ergaster, Paranthropus robustus, Homo erectus, Homo heidelbergensis, Homo neanderthalensis, Homo sapiens.Themes of anatomy, DNA, global expansion, tool use, diet, communication, ecology, society, and culture run through the section.Glossary/Index/Acknowledgements

    We assumed we could control the biological productivity of salmon and 'improve' upon natural processes that we didn't even try to understand. We assumed we could have salmon without rivers." --from the introductionFrom a mountain top where an eagle carries a salmon carcass to feed its young to the distant oceanic waters of the California current and the Alaskan Gyre, salmon have penetrated the Northwest to an extent unmatched by any other animal. Since the turn of the twentieth century, the natural productivity of salmon in Oregon, Washington, California, and Idaho has declined by eighty percent. The decline of Pacific salmon to the brink of extinction is a clear sign of serious problems in the region.In Salmon Without Rivers, fisheries biologist Jim Lichatowich offers an eye-opening look at the roots and evolution of the salmon crisis in the Pacific Northwest. He describes the multitude of factors over the past century and a half that have led to the salmon's decline, and examines in depth the abject failure of restoration efforts that have focused almost exclusively on hatcheries to return salmon stocks to healthy levels without addressing the underlying causes of the decline. The book:describes the evolutionary history of the salmon along with the geologic history of the Pacific Northwest over the past 40 million yearsconsiders the indigenous cultures of the region, and the emergence of salmon-based economies that survived for thousands of yearsexamines the rapid transformation of the region following the arrival of Europeanspresents the history of efforts to protect and restore the salmonoffers a critical assessment of why restoration efforts have failedThroughout, Lichatowich argues that the dominant worldview of our society -- a worldview that denies connections between humans and the natural world -- has created the conflict and controversy that characterize the recent history of salmon; unless that worldview is challenged and changed, there is little hope for recovery. Salmon Without Rivers exposes the myths that have guided recent human-salmon interactions. It clearly explains the difficult choices facing the citizens of the region, and provides unique insight into one of the most tragic chapters in our nation's environmental history.

    The consequences of losing beavers were profound: streams eroded, wetlands dried up, and species from salmon to swans lost vital habitat. Today, a growing coalition of “Beaver Believers”―including scientists, ranchers, and passionate citizens―recognizes that ecosystems with beavers are far healthier, for humans and non-humans alike, than those without them. From the Nevada deserts to the Scottish highlands, Believers are now hard at work restoring these industrious rodents to their former haunts. Eager is a powerful story about one of the world’s most influential species, how North America was colonized, how our landscapes have changed over the centuries, and how beavers can help us fight drought, flooding, wildfire, extinction, and the ravages of climate change. Ultimately, it’s about how we can learn to coexist, harmoniously and even beneficially, with our fellow travelers on this planet.

    This work describes the journey of the wolves themselves and the people who faithfully followed them through the wilds of Yellowstone. It also includes details about the lives of these animals.

    Get ready to unthink what you thought you knew and journey into the deep, dark depths of the Jurassic.The discovery of the first feathered dinosaur in China in 1996 sent shockwaves through the palaeontological world. Were the feathers part of a complex mating ritual, or a stepping stone in the evolution of flight? And just how closely related is T. rex to a chicken? Award-winning journalist John Pickrell reveals how dinosaurs developed flight and became the birds in our backyards. He delves into the latest discoveries in China, the US, Europe and uncovers a thriving black market in fossils and infighting between dinosaur hunters, plus the controversial plan to use a chicken to bring dinosaurs back from the dead.

    facilities. For Hargrove, becoming an orca trainer fulfilled a childhood dream. However, as his experience with the whales deepened, Hargrove came to doubt that their needs could ever be met in captivity. When two fellow trainers were killed by orcas in marine parks, Hargrove decided that SeaWorld's wildly popular programs were both detrimental to the whales and ultimately unsafe for trainers.After leaving SeaWorld, Hargrove became one of the stars of the controversial documentary Blackfish. The outcry over the treatment of SeaWorld's orca has now expanded beyond the outlines sketched by the award-winning documentary, with Hargrove contributing his expertise to an advocacy movement that is convincing both federal and state governments to act.In Beneath the Surface, Hargrove paints a compelling portrait of these highly intelligent and social creatures, including his favorite whales Takara and her mother Kasatka, two of the most dominant orcas in SeaWorld. And he includes vibrant descriptions of the lives of orcas in the wild, contrasting their freedom in the ocean with their lives in SeaWorld.Hargrove's journey is one that humanity has just begun to take-toward the realization that the relationship between the human and animal worlds must be radically rethought.

    These great beasts, or “megafauna,” lived on every habitable continent and on many islands. With a handful of exceptions, all are now gone.What caused the disappearance of these prehistoric behemoths? No one event can be pinpointed as a specific cause, but several factors may have played a role. Paleomammalogist Ross D. E. MacPhee explores them all, examining the leading extinction theories, weighing the evidence, and presenting his own conclusions. He shows how theories of human overhunting and catastrophic climate change fail to account for critical features of these extinctions, and how new thinking is needed to elucidate these mysterious losses.Along the way, we learn how time is determined in earth history; how DNA is used to explain the genomics and phylogenetic history of megafauna—and how synthetic biology and genetic engineering may be able to reintroduce these giants of the past. Until then, gorgeous four-color illustrations by Peter Schouten re-create these megabeasts here in vivid detail.

    A Papua New Guinean elder shoves off in his hand-carved canoe, ready to summon a shark with ancient magic. A scientist finds a rare shark in Indonesia and forges a deal with villagers so it and other species can survive.In this eye-opening adventure that spans the globe, Juliet Eilperin investigates the fascinating ways different individuals and cultures relate to the ocean’s top predator. Along the way, she reminds us why, after millions of years, sharks remain among nature’s most awe-inspiring creatures.From Belize to South Africa, from Shanghai to Bimini, we see that sharks are still the object of an obsession that may eventually lead to their extinction. This is why movie stars and professional athletes go shark hunting in Miami and why shark’s fin soup remains a coveted status symbol in China. Yet we also see glimpses of how people and sharks can exist alongside one another: surfers tolerating their presence off Cape Town and ecotourists swimming with sharks that locals in the Yucatán no longer have to hunt.With a reporter’s instinct for a good story and a scientist’s curiosity, Eilperin offers us an up-close understanding of these extraordinary, mysterious creatures in the most entertaining and illuminating shark encounter you’re likely to find outside a steel cage.