In
, Robert Macfarlane delivers an epic exploration of the Earth’s underworlds as they exist in myth, literature, memory, and the land itself. Traveling through the dizzying expanse of geologic time—from prehistoric art in Norwegian sea caves, to the blue depths of the Greenland ice cap, to a deep-sunk "hiding place" where nuclear waste will be stored for 100,000 years to come—
takes us on an extraordinary journey into our relationship with darkness, burial, and what lies beneath the surface of both place and mind.
Global in its geography and written with great lyricism,
speaks powerfully to our present moment. At once ancient and urgent, this is a book that will change the way you see the world.

Cosmos has 13 heavily illustrated chapters, corresponding to the 13 episodes of the Cosmos television series. In the book, Sagan explores 15 billion years of cosmic evolution and the development of science and civilization. Cosmos traces the origins of knowledge and the scientific method, mixing science and philosophy, and speculates to the future of science. The book also discusses the underlying premises of science by providing biographical anecdotes about many prominent scientists throughout history, placing their contributions into the broader context of the development of modern science.
The book covers a broad range of topics, comprising Sagan's reflections on anthropological, cosmological, biological, historical, and astronomical matters from antiquity to contemporary times. Sagan reiterates his position on extraterrestrial life—that the magnitude of the universe permits the existence of thousands of alien civilizations, but no credible evidence exists to demonstrate that such life has ever visited earth.

Pulitzer Prize-winning author Carl Sagan traces our exploration of space and suggests that our very survival may depend on the wise use of other worlds. This stirring book reveals how scientific discovery has altered our perception of who we are and where we stand, and challenges us to weigh what we will do with that knowledge. Photos, many in color.