Jane Pauley hosts a special broadcast of "Sunday Morning," called "Mind Matters," devoted to the mysteries of the brain. Features include: Mo Rocca examining what makes a genius; Rita Braver looks at the intersection between art and mania; Faith Salie on the prospect of using psychedelic drugs to combat anxiety and depression; Martha Teichner on animal intelligence; and Tracy Smith talks with Glenn Close, whose foundation, Bring Change to Mind, aims to destigmatize mental illness.