Covering things like immortality, recovered memories, multiverses, etc. , I was most intrigued by the definition of life, how we can only describe what we know about us, not truly define. It is very possible that life exists everywhere throughout the universe but we are unable to recognize it. Also if interest was the author's treatment of what it takes for us to recognize intelligence and autonomy. What would we do if our lab animals could ask us to stop This is not a vegan polemic but rather a serious question about our egos and ability to acknowledge intelligence in others. In fact, the book seemingly is aimed at broadening our outlook on a variety of subjects.