Based on the latest phylogenetic studies, this book reveals the remarkable new history of how passerines diversified and dispersed across the entire world.
The Garden of Eden as the ideal and untouched site of life's creation persists in popular thought, even as we have uncovered a lengthy fossil record and developed a scientific understanding of evolution. The continent of Africa is a good candidate for Eden: its generally warm climate, rich vegetation, and variety of animal species lend themselves easily to such a comparison. Yet in the time since the first primates appeared millions of years ago, Africa has undergone profound alterations in physical geography, climate, and biota. Linking the evidence of the past with that of the present, this exquisitely illustrated guide examines the evolution of the mammalian fauna of Africa within the context of dramatic changes over the course of more than 30 million years of primate presence. The book covers such topics as dating, continental drift, and global climate change and the likely motors of evolution as well as the physical evolution of the African continent, including present and past climates, and the major determinants of plant and mammal distributions. The authors discuss human evolution as a part of the larger pattern of mammalian evolution while responding to the unique interest that we have in our own past. The meticulous reconstructions of fossil mammals in this book are the result of detailed anatomical research. Restorations of mammalian musculature and appearance take into account the affinities between fossil forms and extant species in order to make well-founded inferences about unpreserved animal attributes. Environmental reconstructions benefit from the authors' visits to more than a dozen wildlife preserves in five African countries as well as the use of an extensive database of published studies on the evolution of landscapes on the continent. A fascinating read and a visual feast, Evolving Eden lays the foundation for a deeper appreciation of contemporary African wildlife.
A closer look at genealogy, incorporating how biological, anthropological, and technical factors can influence human lives We are at a pivotal moment in understanding our remote ancestry and its implications for how we live today. The barriers to what we can know about our distant relatives have been falling as a result of scientific advance, such as decoding the genomes of humans and Neanderthals, and bringing together different perspectives to answer common questions. These collaborations have brought new knowledge and suggested fresh concepts to examine. The results have shaken the old certainties. The results are profound; not just for the study of the past but for appreciating why we conduct our social lives in ways, and at scales, that are familiar to all of us. But such basic familiarity raises a dilemma. When surrounded by the myriad technical and cultural innovations that support our global, urbanized lifestyles we can lose sight of the small social worlds we actually inhabit and that can be traced deep into our ancestry. So why do we need art, religion, music, kinship, myths, and all the other facets of our over-active imaginations if the reality of our effective social worlds is set by a limit of some one hundred and fifty partners (Dunbar’s number) made of family, friends, and useful acquaintances? How could such a social community lead to a city the size of London or a country as large as China? Do we really carry our hominin past into our human present? It is these small worlds, and the link they allow to the study of the past that forms the central point in this book.
In this volume, the geologic and planetary science communities explore impact events and how they affected the evolution of Earth and other planetary bodies. these papers are the outcome of a conference held every five years.
Chronicles the evolution of insects and explains how evolutionary innovations have enabled them to disperse widely, occupy narrow niches, and survive global catastrophes. --Publisher's description.
With this lively book of activites as their guide, students can follow seven scientists into their labs and out to the field to discover how evolution works. Meanwhile, you'll benefit from the practical help the book provides with the twin challenges of evolution: what to teach and how to teach it. For students, Virus and the Whale brings to light some of today's most exciting and up-to-date research through the stories of scientists who study evolution. Each featured research project highlights an important aspect of evolutionary biology, from the "arms race" between viruses and their human hosts to the long-term evolutionary changes that can turn a land mammal into a whale. The activites lead students to investigate evolution as they try out the kinds of creative thinking skills real scientists use to make new discoveries. For teachers, three preliminary chapters explain how to use the scientists' stories as a logical framework for teaching evolutionary concepts. These chapters provide accurate natural history background; offer additional information on the evolution of each of the seven organisms investigated in the book; and introduce common ways in which children and adults think and learn about evolution. Each activity lists learning outcomes tied to the U.S. National Science Education Standards and includes assessment questions and materials lists. Virus and the Whale combines a dynamic narrative with easy-to-use activities, clear illustrations, and a welcome dose of humour.
Computations are made for the evolution of a population I star of 15.6 solar masses and an agezero composition of hydrogen concentration x = 0.90, helium concentration Y = 0.08, and the concentration of the remaining elements Z = 0.02, through four phases: (1) hydrogen exhaustion in the convective core, (2) gravitational contraction of the core, (3) helium burning, (4a) the onset of carbon burning, (4b) the onset of neon burning in the absence of a preceding carbon burning phase. This discussion builds upon the model treated by Sakashita, Ono, and Hayashi ... --p.i.