Near Geneva, Switzerland scientists from the European Center for Nuclear Research are scheduled to present preliminary evidence in their search to find the Higgs boson particle, commonly known as the "God particle." Proving its existence would validate the leading theory of particle physics. Harvard physics professor and particle theory expert Dr. Lisa Randall is the author of the new book "Knocking on Heaven's Door: How Physics and Scientific Thinking Illuminate the Universe and the Modern World." She talks about why the Higgs boson particle matters so much to scientists.