I am not going to read the book. I don’t have time. I did read a synopsis and I see nothing about the book that states that life is only on the Earth. They claim that the conditions for life are exceedingly rare. I am sure they have some theories about that. But we have barely begun to even find extra solar planets let alone map any other solar systems. We are as a matter of fact finding many more planets than scientists expected and planets around binary and trinary systems where many scientists thought we wouldn’t. I am not going to eat crow because of one book by two scientists. They could be wrong and so could I. I was simply saying that if Earth is the only planet with life or one of only a tiny handful in the vastness of the universe it would go against the order of the universe as I have observed it.
...and your bona fides compared to these 2 scientists is...?
BTW, these scientists only present the scientific facts as they exist, to the best of astrophysical knowledge, they don’t present wild theories.
How many extrasolar planets would it take to begin to tackle the problem of probability of life? A million?