Einstein meets Ovid in Tonelli’s compelling account of how the universe was born and how it has since evolved. Grounded in theoretical science but sustained by artistic fervor, this account not only illuminates the precepts of modern cosmology for nonspecialists, but also endows those precepts with rare imaginative power. Though Tonelli incorporates technical terms (leptons, neutrinos, muons) in his narrative, interested nonspecialists will understand—even delight in—a story that begins in the mysterious triggering of the big bang and culminates in the emergence of a universe filled with galaxies where stellar fire warms planets (like ours) capable of sustaining intelligent life. Readers will thrill at the opportunity to accompany a world-class physicist to the frontiers of cosmological science, there to contemplate the unfolding of the universe and to gauge the dazzling new technologies enabling scientists to scrutinize that unfolding. Others have told this story, of course, but no one has so enriched the science of this cosmic drama with such meaningful forays into mythology, scripture, music, and history. Thus, while teaching readers about the scientific discoveries of modern cosmology, Tonelli also compellingly explores the primal, prescientific human emotions—wonder, anxiety, hope—that have animated the researchers who have made those discoveries. A science book that will matter deeply to nonscientists..