The Kepler telescope; discovering genes for Alzheimer’s and autism; using computers to authenticate paintings; profile of Maydianne Andrade

Astronomers on the brink of finding "another Earth" in our galaxy, using a new planet-hunting machine: the Kepler telescope; Rudy Tanzi, a pioneer in discovering genes for Alzheimer's disease, and others who are on the hunt for the genetic key to autism; the use of computers to authenticate paintings; and a profile of spider scientist Maydianne Andrade.