One of Britain's foremost astrobiologists offers an accessible and game-changing account of life on Earth. __________________ Why is all life based on carbon rather than silicon? And beyond Earth, would life - if it exists - look like our own? __________________ The puzzles of life astound and confuse us like no other mystery. But in this groundbreaking book, Professor Charles Cockell reveals how nature is far more understandable and predictable than we would think. Breathing new life into Darwin's theory of natural selection, The Equations of Life puts forward an elegant account of why evolution has taken the paths it has. In a captivating journey into the forces that shape living things on Earth, Cockell explains that the fundamental laws of physics constrain nature at every turn. Fusing the latest in scientific research with fascinating accounts of the creatures that surround us, this is a compelling argument about what life can - and can't - be.

This volume provides an in-depth discussion on the central question - how can people express and survive dissent and disagreement in confined habitats in space? The discussion is an important one because it could be that the systems of inter-dependence required to survive in space are so strong that dissent becomes impossible. John Locke originally said that people have a right to use revolution to overthrow a despotic regime. But if revolution causes violence and damage that causes depressurisation with the risk of killing many people, is it even permissible to have a revolution? How then are people to express their liberty or dissatisfaction with their rulers? The emergence of structures of dissent and disagreement is an essential part of the construction of a framework of liberty in space (revolution is just the extreme example) and thus the topic deserves in-depth and immediate attention. Even today, the way in which we assemble organisations and corporations for the government and private exploration of space must take into account the need for mechanisms to allow people to express dissent.

This volume provides an in-depth discussion on the central question - how can people express and survive dissent and disagreement in confined habitats in space? The discussion is an important one because it could be that the systems of inter-dependence required to survive in space are so strong that dissent becomes impossible. John Locke originally said that people have a right to use revolution to overthrow a despotic regime. But if revolution causes violence and damage that causes depressurisation with the risk of killing many people, is it even permissible to have a revolution? How then are people to express their liberty or dissatisfaction with their rulers? The emergence of structures of dissent and disagreement is an essential part of the construction of a framework of liberty in space (revolution is just the extreme example) and thus the topic deserves in-depth and immediate attention. Even today, the way in which we assemble organisations and corporations for the government and private exploration of space must take into account the need for mechanisms to allow people to express dissent.

This book discusses UV radiation, its effects on ecosystems and the likely evolutionary consequences of changed UV radiation environments, past, present and future. The first two chapters examine the history of the UV radiation climate of earth and the factors that determine organismal and ecosystem exposure. Their purpose is to give the reader a physical perspective on UV radiation and an understanding of the constantly changing UV environment that ecosystems are exposed to over time. Variations in the UV radiation environment occur at the local level (such as boundary layer and plant canopy effects) through to global-scale changes (such as alterations in the column abundance of UV-B protecting ozone). UV radiation regimes also vary over temporal scales. These alterations occur on time scales of seconds (the movement of clouds and plant canopies) to literally billions of years (gross long-term changes in the composition of the Earth's atmosphere). In the chapters that follow five specific biological and ecological topics in photobiology are considered. They are effects of UV radiation on amphibians, plants, corals, aquatic microbial ecosystems and Antarctic ecosystems that are exposed to the anthropogenically generated ozone 'hole'. These chapters consider UV radiation effects at a diversity of levels from the biochemical to the community. Their purpose is to provide the reader with our current understanding of the ecological effects of UV radiation, the areas where questions still remain and to provide a perspective from which the reader can better understand questions in evolutionary photobiology. The final chapter investigates the biological consequences of altered extraterrestrial ultraviolet fluxes, which are quite different from those experienced on the Earth. Our knowledge of the role of UV radiation in shaping ecologies and evolutionary change is still in its infancy. This book brings together a number of authors with the aim of helping to consolidate a better understanding of this interesting area of photobiology.

The biological effects of asteroid and comet impacts have been widely viewed as primarily destructive. The role of an impactor in the K/T boundary extinctions has had a particularly important influence on thinking concerning the role of impacts in ecological and biological changes. th During the 10 and final workshop of the ESF IMPACT program during March 2003, we sought to investigate the wider aspects of the involvement of impact events in biological processes, including the beneficial role of these events from the prebiotic through to the ecosystem level. The ESF IMPACT programme (1998-2003) was an interdisciplinary effort that is aimed at understanding impact processes and their effects on the Earth environment, including environmental, geological and biological changes. The IMPACT programme has 15 member states and the activities of the programme range from workshops to short courses on topics such as impact stratigraphy, shock metamorphism, etc. The program has also awarded mobility grants and been involved in the development of teaching aids and numerous publications, including this one.

This book discusses UV radiation, its effects on ecosystems and the likely evolutionary consequences of changed UV radiation environments, past, present and future. The first two chapters examine the history of the UV radiation climate of earth and the factors that determine organismal and ecosystem exposure. Their purpose is to give the reader a physical perspective on UV radiation and an understanding of the constantly changing UV environment that ecosystems are exposed to over time. Variations in the UV radiation environment occur at the local level (such as boundary layer and plant canopy effects) through to global-scale changes (such as alterations in the column abundance of UV-B protecting ozone). UV radiation regimes also vary over temporal scales. These alterations occur on time scales of seconds (the movement of clouds and plant canopies) to literally billions of years (gross long-term changes in the composition of the Earth's atmosphere). In the chapters that follow five specific biological and ecological topics in photobiology are considered. They are effects of UV radiation on amphibians, plants, corals, aquatic microbial ecosystems and Antarctic ecosystems that are exposed to the anthropogenically generated ozone 'hole'. These chapters consider UV radiation effects at a diversity of levels from the biochemical to the community. Their purpose is to provide the reader with our current understanding of the ecological effects of UV radiation, the areas where questions still remain and to provide a perspective from which the reader can better understand questions in evolutionary photobiology. The final chapter investigates the biological consequences of altered extraterrestrial ultraviolet fluxes, which are quite different from those experienced on the Earth. Our knowledge of the role of UV radiation in shaping ecologies and evolutionary change is still in its infancy. This book brings together a number of authors with the aim of helping to consolidate a better understanding of this interesting area of photobiology.

This concise undergraduate textbook brings together Earth and biological sciences to explore the co-evolution of the Earth and life over geological time. Written for a one-semester course, it explores the Earth system at and above the surface of the Earth by examining the interactions and feedback processes between the geosphere, atmosphere, hydrosphere and biosphere. It also explains how the Earth's surface environment involves a complex interplay between these systems. Through a wealth of features and student questioning, the book allows students to understand how physical controls make our planet hospitable for life, investigate the processes of global change that operate on a range of timescales, understand important cross-disciplinary connections and explore how the whole Earth system has evolved. Finally, it assesses how and why the climate of the Earth has varied over geological time, and considers whether life itself is passive or an active agent for change.

Britain's foremost astrobiologist offers an accessible and game-changing account of why life is like it is. The puzzles of life astound and confuse us like no other mystery. But in this revolutionary new book, Charles Cockell reveals how nature is far more understandable and predictable than we think. Refining Darwin's theory of natural selection, Cockell puts forward a remarkable and elegant account of why evolution has taken the paths it has. From animals to atoms, he shows that is it not biology, but physics, which is the true touchstone for understanding life in all its extraordinary forms. _______________ An intriguing and enthralling adventure into the physics of life that is all around us and inside us. Cockell provides a reminder of the seeming rarity of all this beauty but also an invitation to look up to the skies and ask 'where else might something like this be?' - Robin Ince - Presenter of BBC Radio 4's Infinite Monkey Cage Riveting... Cockell is not only a fine scientist but a fine writer too. - Sir Martin Rees - Astronomer Royal and former President of the Royal Society

This concise undergraduate textbook brings together Earth and biological sciences to explore the co-evolution of the Earth and life over geological time. Written for a one-semester course, it explores the Earth system at and above the surface of the Earth by examining the interactions and feedback processes between the geosphere, atmosphere, hydrosphere and biosphere. It also explains how the Earth's surface environment involves a complex interplay between these systems. Through a wealth of features and student questioning, the book allows students to understand how physical controls make our planet hospitable for life, investigate the processes of global change that operate on a range of timescales, understand important cross-disciplinary connections and explore how the whole Earth system has evolved. Finally, it assesses how and why the climate of the Earth has varied over geological time, and considers whether life itself is passive or an active agent for change.