We see it in figures as different - and distant - as Leonardo da Vinci and Albert Einstein: a rare combination of unusual intelligence, remarkable insight, and amazing inventiveness. It's called genius, and most of us, at one point or another, wish we had it. But what is genius, and where does it come from? Are there many types of genius? Guests include Dr. Dean Keith Simonton, Dr. Ellen Winner, Dr. Darold Treffert, and Dr. Harold Bloom.