Brian Hayes & Lawrence Krauss

Today we'll meet the author of an unusual field guide -- a field guide to the kinds of structures you probably see many times a day and think nothing about. Brian Hayes calls his book Infrastructure. We'll talk with him in a few minutes, but first we'll meet physicist Lawrence Krauss, whose new book Hiding in the Mirror asks .. how many dimensions are there in our universe? Krauss says he was actually inspired, in part, by Rod Serling's "Twilight Zone."