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A fascinating book on the joys of discovering how the world works, by the Pulitzer Prize–winning author of Cosmos and Shadows of Forgotten Ancestors.

“Magnificent . . . Delightful . . . A masterpiece. A message of tremendous hope for humanity . . . While ever conscious that human folly can terminate man’s march into the future, Sagan nonetheless paints for us a mind-boggling future: intelligent robots, the discovery of extraterrestrial life and its consequences, and above all the challenge and pursuit of the mystery of the universe.”—Chicago Tribune

“Go out and buy this book, because Carl Sagan is not only one of the world’s most respected scientists, he’s a great writer. . . . I can give a book no greater accolade than to say I’m planning on reading it again. And again. And again.”—The Miami Herald

“The brilliant astronomer . . . is persuasive, provocative and readable.”—United Press International

“Closely reasoned, impeccably researched, gently humorous, utterly devastating.”—The Washington Post