Planet Earth and the other bodies of the Solar System are 4.5 billion years old. They reside in a galaxy (the Milky Way Galaxy) that is 12-14 billion years old, and are part of a universe that is 13-15 billion years old. In Ancient Earth, Ancient Skies, G. Brent Dalrymple, a geologist and widely recognized expert on the age of Earth, reviews the evidence that has led scientists to these conclusions and describes the methods by which this evidence has been gathered.

We need a new philosophy of the earth. Geological time used to refer to slow and gradual processes, but today we are watching land sink into the sea and forests transform into deserts. We can even see the creation of new geological strata made of plastic, chicken bones, and other waste that could remain in the fossil record for millennia or longer. Crafting a philosophy of geology that rewrites natural and human history from the broader perspective of movement, Thomas Nail provides a new materialist, kinetic ethics of the earth that speaks to this moment. Climate change and other ecological disruptions challenge us to reconsider the deep history of minerals, atmosphere, plants, and animals and to take a more process-oriented perspective that sees humanity as part of the larger cosmic and terrestrial drama of mobility and flow. Building on his earlier work on the philosophy of movement, Nail argues that we should shift our biocentric emphasis from conservation to expenditure, flux, and planetary diversity. Theory of the Earth urges us to rethink our ethical relationship to one another, the planet, and the cosmos at large.

A synthesis of all that has been postulated and is known about the age of the Earth

Interdisciplinary Teaching about the Earth and Environment for a Sustainable Future presents the outcomes of the InTeGrate project, a community effort funded by the National Science Foundation to improve Earth literacy and build a workforce prepared to tackle environmental and resource issues. The InTeGrate community is built around the shared goal of supporting interdisciplinary learning about Earth across the undergraduate curriculum, focusing on the grand challenges facing society and the important role that the geosciences play in addressing these grand challenges. The chapters in this book explicitly illustrate the intimate relationship between geoscience and sustainability that is often opaque to students. The authors of these chapters are faculty members, administrators, program directors, and researchers from institutions across the country who have collectively envisioned, implemented, and evaluated effective change in their classrooms, programs, institutions, and beyond. This book provides guidance to anyone interested in implementing change—on scales ranging from a single course to an entire program—by infusing sustainability across the curriculum, broadening access to Earth and environmental sciences, and assessing the impacts of those changes.