"Scientists have been trying for a long time to find a characteristic that will definitively separate us from the other species. So far, all candidates have fallen. Neither the use of tools, nor culture, morality, or rationality are exclusive of human beings. Nor is a concept of death. We're not a unique species. We're just another animal."

I hadnt realized when I picked this up that it was more philosophy argument than popular science, but I still learned a lot! My one critique of this book is in the production, namely that the included photographs showing animal behavior were often too dark to make out much.