Weinberg received the 1979 Nobel Prize for Physics. He's the author of "The First Three Minutes," about the Big Bang. He's currently working on what he calls the "final theory," the search for the ultimate laws of nature--for the final answer to our questions about why nature is the way it is. That search is tied up with work on the Superconducting Super Collider. His new book is called "Dreams of the Final Theory,"