Ok thank you. I get the part about string theorists. SO...the end point of my whole post was that I was watching a show where the cosmologist said at like a trillionth of a second after the big bang, the universe was approximately one centimeter across. I don't know if he meant the big bang era or the inflationary era. What struck me as odd was that as I mentioned, I thought the "rulers" themselves were expanding. So in what way can something be a centimeter across. Centimeter is only a centimeter in reference to a larger measurement. Or was THIS and example of a cosmologist just trying to explain something about relative size in terms the layman might relate to?