For the better part of a century, we have existed in a global nuclear environment. Nuclear power is central to conversations about long-term energy needs, and nuclear weapons play a role in international relations. Moreover, the nuclear industry has had tremendous environmental impacts in the form of land grabs, leakages and exposures, and radioactive waste cleanup. Looking at nuclear history through an environmental lens, Imagining Nuclear Spaces argues that studying both tangible and intangible spaces--and their interaction--is essential for understanding our nuclear age. Nuclear history has taken place not only in physical locations such as reactors and power plants, weapons testing facilities, and uranium mines but also in the intangible realms of media, public dialogue, memory, and imagination. While nuclear histories have generally focused on one region, on atoms for peace or war, or on major accidents, the essays in this volume consider ecological, political, and narrative spaces across the globe. Throughout, they demonstrate the continuities between the physical and the imagined, and highlight similarities across seemingly divergent histories. This timely collection of novel historical research provides a model for pursuing a global environmental history of the nuclear age and sets the agenda for further study.