The Future of Humanity: Terraforming Mars, Interstellar Travel, Immortality, and Our Destiny Beyond Earth

Theoretical physicist Kaku (The Future of the Mind) wonderfully illuminates possible ways the human race could survive on other planets. Kaku, certain that “either we must leave the Earth or we will perish,” begins with a brief history of humanity’s space-faring efforts before turning to current efforts to return to the Moon and reach Mars, led by billionaires such as Jeff Bezos, Richard Branson, and Elon Musk. After discussing how Mars might be rendered livable, Kaku describes the possibility of reaching bodies beyond our solar system. Following these theoretical milestones, Kaku plots increasingly speculative ways that humans might reach further solar systems and eventually escape the end of the universe itself. The lengthy journeys required to reach such destinations prompt discussions of robots and AI, ways in which humans might become immortal, and the characteristics of advanced alien civilizations. Kaku generally keeps his concepts understandable (one notable exception is his use of string theory in explaining how we could travel to other universes), aided by pop culture references to Star Trek and science fiction novels. Given Kaku’s track record of bestselling popular science books, this work, too, should go far. (Mar.)