theology is unnecessary. >> larry: stephen hawking on why we exist next on "larry king live." good evening. very special program tonight. stephen hawking is a theoretical physicist. he was the professor of mathematics at the universe of cambridge for 30 years. he's the 2009 recipient of the presidential medal of freedom and co-author of a brilliant and controversial new book "the grand design." we welcome him back to "larry king live." we have a serious of questions planned. let's get right to it. stephen, why is it important to find the grand design of our universe? >> i believe everyone should have a broad picture of how the universe operates and our place