The world's most eminent scientist of space explains why he believes in extraterrestrial life
Harvard's top astronomer lays out his controversial theory that our solar system was recently visited by advanced alien technology from a distant star.
From the iconoclastic Harvard astronomer and New York Times best-selling author of Extraterrestrial, an urgent explanation of why becoming an interstellar species is imperative for humanity's survival - and a game plan for how we can settle among the stars.
From the iconoclastic Harvard astronomer and New York Times best-selling author of Extraterrestrial, an urgent explanation of why becoming an interstellar species is imperative for humanity's survival - and a game plan for how we can settle among the stars.