There have been plenty of books that document what Townes is saying. If you haven’t already, you might want to check out Dr. Gonzalez book, “The Priviledged Planet.” Here’s the video based on the same, in case you’re interested—GGG
(This is part 1, you’ll see part 2 thru 6 on the right side)
http://www.youtube.com/watch?v=tQdxRj49m5c
I hardly need to read a book about what Townes said in that statement. He countered an assumption with an assumption. There is no basis for a doctoral thesis there or a need for a doctorate degree to understand how much water an assumption holds.
I curse the CO phone company that spent a year tearing this entire valley up to upgrade the phone lines yet cannot provide DSL here.