Cosmos is a not a science book, it is about everthing that relates to our universe. Through its thirteen chapters, it tells the tales of human origin, scientific discoveries and space explorations of human. Many passages reflect strongly the beliefs and opinions of Carl Sagan (his faith on science as the true pathway to understanding the cosmos, his distaste of our own self-destructive instincts and mostly his sence of the insignificance of the human race against the universe), which I personally think is the most interesting and thought-provoking part of the book. All in all a GREAT book to read and treasure. Its one of those books which you borrowed it first from library, and then bought your own copy just because it's simply a book to own!