There are three questions that speak directly to human uniqueness and purpose.  1) Does intelligent non-human life exist anywhere in the universe?; 2) Given the fullness of time, will human beings spread across the galaxies?; and 3) Is there something special about this universe that causes or even requires self-aware creatures like human to appear? Today’s experts look at humankind and whether the evolution of conscious beings was an accident or a necessity. Joining host Robert Kuhn are Nobel Laureate and physicist Leon Lederman; evolutionary biologist Francisco Ayala; planetary scientist Bruce Murray and mathematician Frank Tipler; and sci-fi novelist Gregory Benford. From the Series:USC Presents...Closer To Truth