What makes Mona Lisa’s smile so intriguing? What makes Picasso’s portraits so compelling? Kurt Andersen hosts artists Chuck Close and Devorah Sperber, with neuroscientists Margaret Livingstone, Chris Tyler and Ken Nakayama, as they examine the power of brain imaging technology to illuminate how we perceive the most intimate yet public of features, the human face. Sign up for our free newsletter to see exclusive features and be the first to get news and updates on upcoming WSF programs: www.worldsciencefestival.com/newsletter-youtube/