For millions of years reptiles have walked, crawled, and slithered over the face of our Earth. From the mighty dinosaurs who dominated the land, the pterosaurs who took to the air, and the marine adapted ichthyosaurs, to the living reptiles today such as the lizards, snakes, crocodiles, and turtles, plus the single species of tuatara in New Zealand, reptiles have come in all shapes and sizes. In this Very Short Introduction Tom Kemp discusses the adaptations reptiles made to first leave the sea and colonise the land in dry conditions, such as their waterproof skin, their ability to expel almost dry waste products, their efficient use of external heat for maintaining their body temperature, and the amniotic egg that is laid and develops on dry land. Considering the different living groups of reptiles today, Kemp then describes how their respective bodies are adapted for their different ways of life, from snake feeding patterns to the way crocodiles breathe. Finally, Kemp assesses the threat of extinction to reptile species due to over-exploitation, habitat destruction, and climate change, and considers what can be done. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

From dinosaurs to lizards, snakes, and turtles, Tom Kemp considers the range of reptiles which have walked our Earth. Exploring how evolutionary adaptions have fitted them to their individual niches, he discusses their biology, such as cold bloodedness and feeding habits, and analyses why reptiles have been so successful throughout history.

This Very Short Introduction presents a succinct and accessible guide to the key episodes in the story of life on earth - from the very origins of life four million years ago to the extraordinary diversity of species around the globe today.

Jesus turned water into wine, Mohammad split the moon into two, and Buddha walked and spoke immediately upon birth. According to recent statistics, even in the present age of advanced science and technology, most people believe in miracles. In fact, newspapers and television regularly report alleged miracles, such as recoveries from incurable diseases, extremely unlikely coincidences, and religious signs and messages on unexpected objects. In this book the award-winning author and philosopher Yujin Nagasawa addresses some of our most fundamental questions concerning miracles. What exactly is a miracle? What types of miracles are believed in the world's great religions? What do recent scientific findings tell us about miracles? Can we rationally believe that miracles have really taken place? Can there be acts that are more religiously significant than miracles? Drawing on a vast variety of fascinating examples from across the major religions, Nagasawa discusses the lively debate on miracles that ranges from reported miracles in ancient scriptures in the East and West to cutting-edge scientific research on belief formation. Throughout, he drives us to ask ourselves if and how we can still believe in in miracles in the twenty-first century. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

The importance of the oceans to life on Earth cannot be overstated. Liquid water covers more than 70% of our planet's surface and, in past geological time, has spread over 85%. Life on Earth began in the oceans over 3.5 billion years ago and remained there for the great majority of that time. Today the seas still provide 99% of habitable living space, the largest repository of biomass, and holds the greatest number of undiscovered species on the planet. Our oceans are vital for the regulation of climate, and with global warming and decreasing land area, they have become increasingly important as the source of food, energy in the form of oil and gas, and for their mineral wealth. Oceans also form a key part of the biogeochemical cycles of carbon, nitrogen, and other elements critical to life. Nutrients in upwelling areas are spread by ocean currents, and the plankton of the seas supports a wealth of wildlife. In this Very Short Introduction Dorrik Stow analyses these most important components of our blue planet and considers their relationship with, and exploitation by, humans. He shows how the oceans are an essential resource to our overpopulated world, and discusses why exploration and greater scientific understanding of the oceans, their chemistry, and their mineral wealth are now a high priority. Stow also explores what we know of how oceans originate, and evolve and change; the shape of the seafloor and nature of its cover; the physical processes that stir the waters and mix such a rich chemical broth; and the inseparable link between oceans and climate. As polar ice melts and sea-levels rise, countless millions who have made their homes on low-lying lands close to the sea are threatened. As scientific exploration of the seas gathers pace, the new knowledge gained of the ocean-Earth systems and their interaction with the human environment is vital to our understanding of how we can preserve these ultimately fragile environments. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

Dinosaurs are fascinating creatures and their popularity seems never ending, fuelled by films such as Jurassic Park and documentaries such as Walking with Dinosaurs. Yet dinosaurs (or more precisely non-avian dinosaurs) last trod the Earth 65 million years ago. All we know of them today are their fossilised bones, the tracks and traces that they left behind and, in very rare instances, some of the soft tissues or even traces of their chemistry. In many respects dinosaurs present us with one of the ultimate forensic challenges: they comprise the fragmentary remains of creatures that died many tens of millions of years ago, rather than just recently, or a few tens of years ago, which is the problem usually faced by forensic pathologists. How much do we really know about them, and to what extent can their remains inform us about ancient worlds, and indeed about the history of our planet? In this Very Short Introduction David Norman discusses how dinosaurs were first discovered and interpreted, and how our understanding of them has changed over the past 200 years. He looks at some of the amazing discoveries that have enabled us to gain new and unexpected insights into dinosaurs as animals with natural histories and behaviours, and considers some of the biggest questions in dinosaur biology, such as the implications of them having warm blood. Norman also shows how research upon dinosaurs has been enriched, particularly in recent decades, by technological break-throughs, which complement the informed speculation and luck which have played a part in many of the major discoveries. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

Molecular biology has revolutionized our understanding of animals and their evolution. In this Very Short Introduction, Peter Holland provides an authoritative summary of the modern view of animal life, its origins, and the new classification resulting from DNA studies.

Why do we need sleep? How much sleep is enough? What is sleep? What happens when we don't get enough? We spend about a third of our lives asleep - it plays a crucial role in our health and wellbeing. References to sleep abound in literature and art, and sleep has been recognized as fundamental to the human condition for thousands of years. Over the past century, our knowledge of how sleep occurs, what it does, and what happens to our health if we do not have enough has developed hugely. The impact of poor sleep on our quality of life is also gaining recognition and the prevalence of sleep disorders in the population appears to be increasing as we live ever stressful lives. This Very Short Introduction addresses the biological and psychological aspects of sleep, providing a basic understanding of what sleep is and how it is measured, looking at sleep through the human lifespan and the causes and consequences of major sleep disorders. Russell G. Foster and Steven W. Lockley go on to consider the impact of modern society, examining the relationship between sleep and work hours, and the impact of our 24/7 society. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

This book examines Earth's reptiles, highlighting a diverse selection of 22 notable species from around the world. A blend of narrative text, authoritative nonfiction content, fact boxes, and vivid photos bring these amazing reptiles to life. Features include a glossary, online resources, source notes, and an index. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.

From dinosaurs to lizards, snakes, and turtles, Tom Kemp considers the range of reptiles which have walked our Earth. Exploring how evolutionary adaptions have fitted them to their individual niches, he discusses their biology, such as cold bloodedness and feeding habits, and analyses why reptiles have been so successful throughout history.