Plus: why you shouldn’t give probiotics to your dog.
Zak Ebrahim is the son of a terrorist. Phyllis Rodriguez lost her son on 9/11. In an inspiring conversation, the two share their personal histories of lives devastated by violence — and rebuilt by tolerance.
Does money make you mean? Does lack of money make you sick? Epidemiologist Richard Wilkinson and social psychologist Paul Piff discuss the human effects of economic and social inequality.
What can be guessed about you from your online behavior? Two computer privacy experts — economist Alessandro Acquisti and computer scientist Jennifer Golbeck — on how little we know about how much others know.