On today’s show: Paul J. Zak describes his research into what has been called “the moral molecule,” Oxytocin. Joe Bastianich talks about his memoir, Restaurant Man. Today’s installment of the BBC’s A History of the World in 100 Objects continues with a mysterious jade disc known as a Bi. Rosecrans Baldwin describes his comic account of living in the French capital, Paris, I Love You But You’re Bringing Me Down. And The Daily Show co-creator Lizz Winstead talks about her career in comedy.