books.google.co.uk - It's been nearly four decades since Carl Sagan first addressed the general public from a scientist's perspective, confronting the possibility of extraterrestrial life. We've learned a lot in those years, and planetary scientist David Grinspoon is well prepared to explore this field with a new generation...http://books.google.co.uk/books/about/Lonely_Planets.html?id=xIIYCoutQJsC&q=possible&utm_source=gb-gplus-shareLonely Planets
