How can we bring together the study of genes, embryos and fossils? Embryos in Deep Time is a critical synthesis of the study of individual development in fossils. It brings together an up-to-date review of concepts from comparative anatomy, ecology and developmental genetics, and examples of different kinds of animals from diverse geological epochs and geographic areas. Can fossil embryos demonstrate evolutionary changes in reproductive modes? How have changes in ocean chemistry in the past affected the development of marine organisms? What can the microstructure of fossil bone and teeth reveal about maturation time, longevity and changes in growth phases? This book addresses these and other issues and documents with numerous examples and illustrations how fossils provide evidence not only of adult anatomy but also of the life history of individuals at different growth stages. The central topic of Biology today—the transformations occurring during the life of an organism and the mechanisms behind them—is addressed in an integrative manner for extinct animals.
Over the past decade, fossil finds from China have stunned the world, grabbing headlines and changing perceptions with a wealth of new discoveries. Many of these finds were first announced to English speakers in the journal Nature.Rise of the Dragon gathers together sixteen of these original reports, some augmented with commentaries originally published in Nature's "News and Views" section. Perhaps the best known of these new Chinese fossils are the famous feathered dinosaurs from Liaoning Province, which may help end one of the most intense debates in paleontology—whether birds evolved from dinosaurs. But other finds have been just as spectacular, such as the minutely preserved (to the cellular level) animal embryos of the 670 million-year-old Duoshantuo phosphorites, or the world's oldest known fish, from the Chengjiang formation in southwestern Yunnan Province. Rise of the Dragon makes descriptions and detailed discussions of these important finds available in one convenient volume for paleontologists and serious fossil fans.
“Three stories with a common theme: the female psyche, multiplied and divided,” says Greg Bear in his introduction to Women in Deep Time. “There’s probably something Jungian in common with all three. At any rate, throughout my writing career (and for whatever reason) I’ve been fascinated by the feminine voice.” Featured in this special collection are “Sisters,” Nebula Award finalist “Scattershot,” in which the inhabitants of many universes meet in limbo, and the Nebula Award–winning “Hardfought,” in which engineered warriors redefine humanity.
The Geologic Time Scale 2012, winner of a 2012 PROSE Award Honorable Mention for Best Multi-volume Reference in Science from the Association of American Publishers, is the framework for deciphering the history of our planet Earth. The authors have been at the forefront of chronostratigraphic research and initiatives to create an international geologic time scale for many years, and the charts in this book present the most up-to-date, international standard, as ratified by the International Commission on Stratigraphy and the International Union of Geological Sciences. This 2012 geologic time scale is an enhanced, improved and expanded version of the GTS2004, including chapters on planetary scales, the Cryogenian-Ediacaran periods/systems, a prehistory scale of human development, a survey of sequence stratigraphy, and an extensive compilation of stable-isotope chemostratigraphy. This book is an essential reference for all geoscientists, including researchers, students, and petroleum and mining professionals. The presentation is non-technical and illustrated with numerous colour charts, maps and photographs. The book also includes a detachable wall chart of the complete time scale for use as a handy reference in the office, laboratory or field. The most detailed international geologic time scale available that contextualizes information in one single reference for quick desktop access Gives insights in the construction, strengths, and limitations of the geological time scale that greatly enhances its function and its utility Aids understanding by combining with the mathematical and statistical methods to scaled composites of global succession of events Meets the needs of a range of users at various points in the workflow (researchers extracting linear time from rock records, students recognizing the geologic stage by their content)
With hundreds of original photographs, optical micrographs and scanning electron micrographs, this atlas describes the progress of the embryo throughout its development, highlighting the formation and differentiation of organ structures. From the preembryonic and embryo stages to the development of the skeleton and striated muscle, organogenesis of the heart, and development of external genitalia, it provides authoritative answers to the most frequently asked question about the human embryo. With its plethora of outstanding photographs and images, experienced embryologists as well as clinicians and students can compare historical ideas with photographic reality.
An essential resource for both students and practitioners, this comprehensive text provides practical, up-to-date information about normal reproduction and reproductive disorders in horses, cattle, small ruminants, swine, llamas, and other livestock. Featuring contributions from experts in the field, each section is devoted to a different large animal species and begins with a review of the clinically relevant aspects of the reproductive anatomy and physiology of both males and females. Key topics include the evaluation of breeding soundness, pregnancy diagnosis, diagnosis and treatment of infertility, abortion, obstetrics, surgery of the reproductive tract, care of neonates, and the latest reproductive technology. Includes coverage of all large animal species. All sections provide a review of clinically pertinent reproductive physiology and anatomy of males and females of each species. Complete coverage of the most current reproductive technology, including embryo transfer, estrous synchronization, and artificial insemination. A new section on alternative farming that addresses reproduction in bison, elk, and deer. New to the equine section: stallion management, infertility, and breeding soundness evaluation. New to the bovine section: estrous cycle synchronization, reproductive biotechnology, ultrasonographic determination of fetal gender, heifer development, and diagnosis of abortion. New to the porcine section: artificial insemination, boar/stud management, diseases of postpartum period, and infectious disease control. New to the llama section: infectious disease and nutrition.
Thanks to enormous scientific efforts of the last decades, in vitro fertilization (IVF) and in vitro production (IVP) have now been introduced successfully in the practice of human infertility treatment and cattle breeding programs. This comprehensive book allows us to bridge the knowledge from both biomedical and veterinary fields of research. For the first time, studies concerning the human embryo as well as embryos from domestic species are brought together. The central theme of the book is "the assessment of mammalian embryo quality". In 15 chapters, written by well-known scientists, different aspects of the assessment of mammalian embryo quality are summarized. Non-invasive and invasive techniques to evaluate embryo quality are separated in two parts. In addition the book is provided with appendices on practical aspects and, thus, the book should be present in each laboratory for IVF and IVP.
"Veterinary Reproduction and Obstetrics has been the standard reference textbook for veterinary students for many years, as well as for students of animal science and related disciplines; in addition it has also been a useful reference source for the practicing veterinary surgeon. The new edition builds on the success of the previous edition covering normal reproduction and reproductive disorders and diseases in the common and less common domesticated species (llamas, alpacas, camels). The book has been completely revised with full colour throughout to include recent developments in reproductive biology and endocrinology, as well as the new knowledge on the causes and treatment of reproductive disease." "This is a reference text that has been refreshed well and warrants a place on practice bookshelves." - Veterinary Record, Feb 2011 Classic text reference Covering all aspects of reproduction and obstetrics in all common and less common domestic species Only book covering full range of domestic animals Practical clinical approach throughout Thorough updating throughout to reflect changes in practice since the last edition New authors and contributors to ensure contemporary and international approach (contributors from Finland, the Netherlands, USA, Denmark an New Zealand) Full colour throughout
Since the first fertilization of a human egg in the laboratory in 1968, scientific and technological breakthroughs have raised ethical dilemmas and generated policy controversies on both sides of the Atlantic. Embryo, stem cell, and cloning research have provoked impassioned political debate about their religious, moral, legal, and practical implications. National governments make rules that govern the creation, destruction, and use of embryos in the laboratory-but they do so in profoundly different ways. In Embryo Politics, Thomas Banchoff provides a comprehensive overview of political struggles aboutembryo research during four decades in four countries-the United States, the United Kingdom, Germany, and France. Banchoff's book, the first of its kind, demonstrates the impact of particular national histories and institutions on very different patterns of national governance. Over time, he argues, partisan debate and religious-secular polarization have come to overshadow ethical reflection and political deliberation on the moral status of the embryo and the promise of biomedical research. Only by recovering a robust and public ethical debate will we be able to govern revolutionary life-science technologies effectively and responsibly into the future.
Why is the universe conscious? What kindles mind inside matter? Why do fundamentalist sciences and religions never ask these questions? This sequel to Embryogenesis deals with the theoretical issues brought up by Embryogenesis, including: the relationship between thermodynamics/entropy and the emergence of life; a speculative set of embryogenic principles for all creatures on all planets in the cosmos; an explanation and critique of Intelligent Design and a proposal for a more dynamic psychospiritual theory of creature development; a series of alternatives to genetic determinism; a discussion of the relationship between consciousness and matter; an interjection of 9/11 (which occurred during the writing of this book); and many other topics. Chapters include: What is Life?: Evolution, Thermodynamics, and Complexity; Is There a Plan?: Creationism, Cultural Relativism, and Paraphysics; Biogenesis and Cosmogenesis: Cells, Genes, and Planets; The Principles of Biological Design: Physical Forces in Nature; The Dynamics of the Biosphere: Deep Time and Space; The Limits of Genetic Determinism: Dimensionless Epigenetic Landscapes; Topokinesis: Physical Forces in Development; Tissue Motifs and Body Plans: Coordinating Form; The Primordial Field: Metabiology and The Molecular Apparatus; Meaning and Destiny: The Relation of Consciousness to Matter
Here is the first complete portrait of the legendary flying dragons of deep time-the pterosaurs-designed for non-specialists, yet founded on the real science of these bizarre creatures. Presented lucidly and accessibly by one of the world's leading experts, David Unwin's book is built on a mountain of new fossil discoveries and the latest research. About 220 millions years ago, a group of reptiles took to the Earth's vast and open skies. No longer tethered to the ground, the earliest pterosaurs evolved into a multitude of diverse forms, spread around the globe, and ruled the skies until they went extinct along with the dinosaurs about 65 millions years ago, rarely leaving fossils as a record of their existence. What they did leave was a mystery for paleontologists to solve; an enigma so difficult to crack that it took centuries of false starts and missteps before the path to a true understanding of pterosaurs was uncovered. Now, an understanding of the fundamental nature of these strange creatures is finally possible. In the last 15 years, stunning new fossil finds and significant advances in technology have led to a breakthrough in our knowledge of pterosaurs. New fossils of the earliest species were discovered in Italy, a remarkably well-preserved and complete wing was found in Central Asia, and, most extraordinarily, a pterosaur embryo inside an egg was unearthed in China. CAT scanning has let researchers glimpse inside pterosaur skulls and construct three-dimensional images of their bodies from crushed bones, and modern techniques for analyzing relationships between species have revealed surprising insights into the evolution of the group. Drawing on these and other advances, DavidUnwin, caretaker of Archaeopteryx and curator at the Museum of Natural History in Berlin, paints pterosaurs and their world more vividly than has previously been possible. He eloquently reconstructs their biology and behavior. Pterosaurs weren't scaly like dinosaurs, but hairy; most were brightly colored and adorned with remarkable head crests; they were excellent fliers with physiologically sophisticated wings; they walked on all fours; and varied in size from eight inches to forty feet in wingspan. He shows how they lived their lives, raised their young, and interacted with the different environments of Mesozoic Earth. Then, building on his thorough examination of their anatomy and lifestyle, and using the powerful technique of cladistic analysis, Unwin unravels the evolutionary history of pterosaurs and establishes their place in the one great tree of life. Packed with 95 color and 30 black and white illustrations-including 10 full-page original color paintings that are scientific recreations of different pterosaur species-"The Pterosaurs From Deep Time" takes readers on an wondrous expedition back through the lost world of the Earth's deep past.
Als die Wege in die Antarktis noch »heroischen Charakter « hatten, machte sich Apsley Cherry-Garrard, Spross einer altenglischen Familie, erst 24-jährig auf, dem berühmten Polarforscher Scott zum Südpol zu folgen. Die Expedition misslang; Scott und einige seiner Gefährten verloren ihr Leben. Cherry-Garrard jedoch gelang die Heimkehr, zahnlos fast, aber von der Berufung beseelt, die Geschichte dieser unmenschlich entbehrungsreichen Mission aufzuschreiben. Die Geschichte eines Scheiterns, aber zugleich auch ein Monument der Freundschaft und des Idealismus: wie man sich in die ewige Nacht aufmacht, nur um das Ei eines Kaiserpinguins zu finden.
Man is entering a new era as a result of advances in human reproduction. Techniques have been developed to assist in the creation of man-artificial insemination and, now, in vitro fertilization (IVF). Soon, other new methods, based upon current advances of the IVF procedure, will develop to improve the quality of human reproduction. The book describes the conceptual framework and details of technique concerned with in vitro fertilization and embryo transfer (ET). Edwards and Steptoe first described the technique of IVF and ET and the subsequent births of two normal babies. Since then, the success rate of the system has been improved by the use of fertility drugs to provide more oocytes and preincubation to mature the oocyte before fertilization. As a result of the continued research from Melbourne and Cambridge, more than 100 babies have been born. A free interchange of information between the Cambridge and Melbourne groups has led to a predictable success rate of 15%-20% per laparoscopy, and infertility centres all over the world are now copying the techniques. It is an appropriate time to inform doctors and scientists to help them understand the various procedures involved in IVF and ET. While many advances will occur in the future, the establishment of high success rates in several of the critical steps in the procedure-oocyte pick-up rate (90%), fertilization (>90%) and early embryo development (70%-90% )-signifies that some of the new techniques are stabilized sufficiently to warrant transmission of information by text, rather than scientific journal.
Authored by leading experts in the field, this book provides the first comprehensive overview of the mechanisms of early patterning and morphogenesis in zebrafish. It summarizes the current knowledge and the key questions for the next decade of research.
"Die Natur erzeugt im ihrem Scho e eine unersch pfliche F lle von wunderbaren Gestalten, durch deren Sch nheit und Mannigfaltigkeit alle vom Menschen geschaffenen Kunstformen weitaus bertroffen werden." Der Naturwissenschaftler Ernst Haeckel stellt in seinem Werk sthetische Formen aus Bereichen der Botanik und der Zoologie zusammen. Zahlreiche Schwarzwei - und Farbabbildungen. Nachdruck der Komplettausgabe von 1904 mit 100 Tafeln und dem "Supplement-Heft" .