“Yeah, this string theory stuff is nice and all, but what does it have to do with the price of eggs?”, is not one of the questions I’ve had to field at the end of a public lecture, but it could have been.
If it had come up, I could have pointed the questioner to this post by Robert. Please, please check out this fine example of how we use scaling laws in physics and in everyday life, with remarkable effects.
P.S. After reading it, I bet you’ll consider contacting your local government representative to get them to urge for more tax dollars to be put into theoretical physics. It’s really the best way to be sure that more of us are kept off the streets… 🙂