books.google.at - This book is a selective and fascinating history of scientific speculation about intelligent extraterrestrial life. From Plutarch to Stephen Hawking, some of the most prominent western scientists have had quite detailed perceptions and misperceptions about alien civilizations: Johannes Kepler, fresh...http://books.google.at/books/about/Civilized_Life_in_the_Universe_Scientist.html?hl=de&id=oMQIQMmAgoIC&utm_source=gb-gplus-shareCivilized Life in the Universe : Scientists on Intelligent Extraterrestrials
