Ocean Worlds

Traces the history and evolution of oceans on Earth as well as their importance and the changes wrought by humans that threaten all aspects of their existence, and looks beyond Earth to oceans on other planets.

In the last 25 years, planetary science experienced a revolution, as vast oceans of liquid water have been discovered within the heart of the icy moons of our Solar System. These subsurface oceans lie hidden under thick layers of ice. We call them ocean worlds. Some of these icy moons, such as Ganymede, may hold two to three times more liquid water than all the water present on Earth, while others, such as Enceladus and Europa, are thought by astrobiologists to be our best hope of finding extraterrestrial life. In this book, we will explore and compare a variety of Solar System ocean worlds, meeting in the process 22 of the most intriguing objects, from the giant asteroid Ceres to the enigmatic, distant Sedna. In doing so, we will also encounter the multiple spacecraft that brought back most of what we know of these worlds (Pioneers, Voyagers, Cassini-Huygens, etc.), as well as the latest scientific research on this new topic. We will also entertain the possibility of life on each of these ocean worlds by assessing their habitability, as ultimately, these ocean worlds might hold the key to answering the fundamental questions in life: How did life appear? Where do we come from? Is there life out there? With the contributions of leading planetary scientists from NASA, ESA, and other institutions, this book aims to be the go-to reference for anyone wanting to know more about this fascinating topic.

Oceans make up most of the surface of our blue planet. They may form just a sliver on the outside of the Earth, but they are very important, not only in hosting life, including the fish and other animals on which many humans depend, but in terms of their role in the Earth system, in regulating climate, and cycling nutrients. As climate change, pollution, and over-exploitation by humans puts this precious resource at risk, it is more important than ever that we understand and appreciate the nature and history of oceans. There is much we still do not know about the story of the Earth's oceans, and we are only just beginning to find indications of oceans on other planets. In this book, geologists Jan Zalasiewicz and Mark Williams consider the deep history of oceans, how and when they may have formed on the young Earth — topics of intense current research — how they became salty, and how they evolved through Earth history. We learn how oceans have formed and disappeared over millions of years, how the sea nurtured life, and what may become of our oceans in the future. We encounter some of the scientists and adventurers whose efforts led to our present understanding of oceans. And we look at clues to possible seas that may once have covered parts of Mars and Venus, that may still exist, below the surface, on moons such as Europa and Callisto, and the possibility of watery planets in other star systems.

This book explores the Indian Ocean world as it is produced by colonial and postcolonial fiction in English. It analyses the work of three contemporary authors who write the Indian Ocean as a region and world—Amitav Ghosh, Abdulrazak Gurnah, and Lindsey Collen—alongside maritime-imperial precursor Joseph Conrad. If postcolonial literatures are sometimes read as national allegories, this book presents an account of a different and significant strand of postcolonial fiction whose geography, in contrast, is coastal and transoceanic. This work imaginatively links east Africa, south Asia and the Arab world via a network of south-south connections that precedes and survives European imperialism. The novels and stories provide a vivid, storied sense of place on both a local and an oceanic scale, and in so doing remap the world as having its centre in the ocean and the south.

This book breaks new ground by bringing together multidisciplinary approaches to examine contemporary Indian Ocean worlds. It reconfigures the Indian Ocean as a space for conceptual and theoretical relationality based on social science and humanities scholarship, thus moving away from an area-based and geographical approach to Indian Ocean studies. Contributors from a variety of disciplines focus on keywords such as relationality, space/place, quotidian practices, and new networks of memory and maps to offer original insights to reimagine the Indian Ocean. While the volume as a whole considers older histories, mobilities, and relationships between places in Indian Ocean worlds, it is centrally concerned with new connectivities and layered mappings forged in the lived experiences of individuals and communities today. The chapters are steeped in ethnographic, multi-modal, and other humanities methodologies that examine different sources besides historical archives and textual materials, including everyday life, cities, museums, performances, the built environment, media, personal narratives, food, medical practices, or scientific explorations. An important contribution to several fields, this book will be of interest to academics of Indian Ocean studies, Afro-Asian linkages, inter-Asian exchanges, Afro-Arab crossroads, Asian studies, African studies, Anthropology, History, Geography, and International Relations.

The Indian Ocean World was an idea borne out by researchers in economic history and trade in the 1980s in response to the compartmentalization of specific area studies within the wider rubric of Asian civilisations and culture. Professor Kirti N. Chaudhuri’s books Trading World of Asia and the English East India Company (1978), and then Trade and Civilization in the Indian Ocean (1985), figured amongst the forefront of this new movement in historical thinking, undertaking detailed historical analysis, first of the English East India Company, and then a comparative cultural history of Asian material life and civilisation. Today, historians continue to hold on to the idea of an Indian Ocean world, although studies now follow a number of different threads, from themes like linguistics and creolization, to the seeds of national consciousness. By presenting a number of studies here, gathered into the themes of ‘Intermixing,’ ‘The World of Trade’ and ‘Colonial Paths,’ it is hoped we can render tribute to one of the outstanding historians in this field and reflect the plenitude of current research in this subject area.

This volume, aimed at the general reader, presents life and times of the amazing animals that inhabited Earth more than 500 million years ago. The Cambrian Period was a critical time in Earth's history. During this immense span of time nearly every modern group of animals appeared. Although life had been around for more than 2 million millennia, Cambrian rocks preserve the record of the first appearance of complex animals with eyes, protective skeletons, antennae, and complex ecologies. Grazing, predation, and multi-tiered ecosystems with animals living in, on, or above the sea floor became common. The cascade of interaction led to an ever-increasing diversification of animal body types. By the end of the period, the ancestors of sponges, corals, jellyfish, worms, mollusks, brachiopods, arthropods, echinoderms, and vertebrates were all in place. The evidence of this Cambrian "explosion" is preserved in rocks all over the world, including North America, where the seemingly strange animals of the period are preserved in exquisite detail in deposits such as the Burgess Shale in British Columbia. Cambrian Ocean World tells the story of what is, for us, the most important period in our planet's long history.

This book explores the ways in which Muslim communities across the Indian Ocean world produced and shaped Islamic law and its texts, ideas and practices in their local, regional, imperial, national and transregional contexts. With a focus on the production and transmission of Islamic law in the Indian Ocean, the chapters in this book draw from and add to recent discourses on the legal histories and anthropologies of the Indian Ocean rim as well as to the conversations on global Islamic circulations. By doing so, this book argues for the importance of Islamic legal thoughts and practices of the so-called "peripheries" to the core and kernel of Islamic traditions and the urgency of addressing their long-existing role in the making of the historical and human experience of the religion. Islamic law was and is not merely brought to, but also produced in the Indian Ocean world through constant and critical engagements. The book takes a long-term and transregional perspective for a better understanding of the ways in which the oceanic Muslims have historically developed their religious, juridical and intellectual traditions and continue to shape their lives within the frameworks of their religion. Transregional and transdisciplinary in its approach, this book will be of interest to scholars of Islamic Studies, Indian Ocean Studies, Legal History and Legal Anthropology, Area Studies of South and Southeast Asia and East Africa.