When you realize that if the temperature goes up fifty degrees and stays there, life will not exist on this earth, and that if it drops, let’s say, another hundred degrees and stays there, life will not be on this earth; when you realize how very delicate this balance is, how the quantity of water is so important—well, when you think of all the accidents of the environment that have fostered life, how can you think that the life we know would exist on any other particle of the universe, no matter how many of these satellites around stars there may be?
Interesting contrast to Carl Sagan if I recall correctly
