Bobby McFerrin: Watch me play ... the audience!
Terry Moore: Why is 'x' the unknown?
Lawrence Lessig: The unstoppable walk to political reform
Gabby Giffords and Mark Kelly: Be passionate. Be courageous. Be your best.
Juan Enriquez: Wil our kids be a different species? (2009)
Harvey Fineberg: Are we ready for neo-evolution? (2011)