No wonder, then, that I wanted to share this book with my friends--but I also wanted to keep it for myself! If you don't read this book, you'll be left wondering what everyone (else) is talking about.

Making only the assumption that you are a random intelligent observer, limits for the total longevity of our species of 0.2 million to 8 million years can be derived at the 95% confidence level. Further consideration indicates that we are unlikely to colonize the Galaxy, and that we are likely to have a higher population than the median for intelligent species.