We live in a visual age, an age of images-iconic, instant, and influential-that have crystallized our conception of the large, the small, and the complex, of both inner and outer space. Some, like Robert Hooke's first microscopic views of the natural world, arose because of new technical capabilities. Others, like the first graphs, were breathtakingly simple but perennially useful. The first stunning picture of Earth from space stimulated an environmental consciousness that has grown ever since; the mushroom clouds from atomic and nuclear explosions became the ultimate symbol of death and destruction; Mercator's flat map of the Earth cemented an entire worldview. John D. Barrow's collection encompasses the frontiers of modern science and its most memorable historic moments. But this is much more than a picture book. Entertaining and informative essays accompany the powerful display of images that have illuminated concepts of far-reaching significance.