books.google.it - Carl Sagan's many contributions to science and society have been profound and far-reaching, influencing millions of people around the world. He carried out significant research in planetary science, was closely associated with the US space program, created the highly acclaimed television series Cosmos,...http://books.google.it/books/about/Carl_Sagan_s_Universe.html?hl=it&id=_mo4AAAAIAAJ&utm_source=gb-gplus-shareCarl Sagan's Universe
