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One of the greatest mysteries in reconstructing the history of life on Earth has been the apparent absence of fossils dating back more than 550 million years. We have long known that fossils of sophisticated marine life-forms existed at the dawn of the Cambrian Period, but until recently scientists had found no traces of Precambrian fossils. The quest to find such traces began in earnest in the mid-1960s and culminated in one dramatic moment in 1993 when William Schopf identified fossilized microorganisms three and a half billion years old. This startling find opened up a vast period of time--some eighty-five percent of Earth's history--to new research and new ideas about life's beginnings. ...
When Darwin wrote his Origin of Species, one of his main concerns was with the perceived shortness of the fossil record of life. Until the work of J. William Schopf and his colleagues, much of this history was thought to be unknowable. This book, through a memoire of Schopf’s personal recollections, documents astonishing discoveries revealing the first 85% of the history of life. These earliest periods of life on Earth emerge as a tale of individual and internationally collaborative exploration told by a scholar whose 60 years of research contributed to the recognition of the richness and diversity which forms the foundation of today’s biodiversity. Key Features Documents, through personal narrative, a paradigm shift is the study of the earliest life Summarizes a fossil record largely unknown until relatively recently Addresses one of Darwin's most troubling concerns about his theory of natural selection Predicts future developments in the study of first life
Major Events in the History of Life, present six chapters that summarize our understanding of crucial events that shaped the development of the earth's environment and the course of biological evolution over some four billion years of geological time. The subjects are covered by acknowledged leaders in their fields span an enormous sweep of biologic history, from the formation of planet Earth and the origin of living systems to our earliest records of human activity. Several chapters present new data and new syntheses, or summarized results of new types of analysis, material not usually available in current college textbooks.
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This book documents astonishing discoveries revealing the first 85% of of the history of life. These earliest periods of life on Earth, once perceived as unknowable, emerge as a tale of individual exploration told by a scholar whose 60 years of research uncovered the richness and diversity which forms the foundation of todays biodiversity.
The Description for this book, Earth's Earliest Biosphere: Its Origin and Evolution, will be forthcoming.
Over the past half-century, studies of the evolution of life have themselves evolved, markedly. Life’s earliest history, unknown and thought unknowable for the 100 years following publication of Darwin’s great opus in 1859 has finally come to light as the documented fossil record has been extended an astonishing sevenfold, from 500 million to now 3,500 million years. No longer are studies of evolution based solely on ancient fossils, now augmented by the evidence of life’s long development encoded in its genetic and biochemical make-up. Indeed, as new knowledge of the history of plants and animals and of their ever-changing environment has been unearthed, understanding of the overridin...
First published in 1992, The Proterozoic Biosphere was the first major study of the paleobiology of the Proterozoic Earth.
This 199 book reviews discoveries in astronomy, paleontology, biology and chemistry to help us to understand the likely origin of life on Earth.
How small can a free-living organism be? On the surface, this question is straightforward-in principle, the smallest cells can be identified and measured. But understanding what factors determine this lower limit, and addressing the host of other questions that follow on from this knowledge, require a fundamental understanding of the chemistry and ecology of cellular life. The recent report of evidence for life in a martian meteorite and the prospect of searching for biological signatures in intelligently chosen samples from Mars and elsewhere bring a new immediacy to such questions. How do we recognize the morphological or chemical remnants of life in rocks deposited 4 billion years ago on ...