A 21st century makeover could be in store for the grocery business now that Amazon has become a major player. Last week, Amazon took a bite out of the industry with an offer to buy the upscale chain Whole Foods for 13.7 billion dollars. Whole Foods has more than 400 stores across the country, 30 of which are right here in Massachusetts. The move could mean substantial changes for how people shop, and not everyone is cheering. It also marks Amazon's latest attempt to dabble in the world of brick and mortar retail. But will it work? Michael Davies, chairman of Endeavour Partners and a senior lecturer at MIT's new design program; Nancy Koehn, a business historian at Harvard Business School; and Dan Primack, business editor for Axios, joined Adam Reilly.

Physics tell us that two objects can't occupy the same space at the same time. But does that principle also apply to superpowers? This Wednesday, North Korea will be the topic du jour for U.S. and Chinese officials as they meet to discuss how to curb the hostile nation's missile program. China's close ties with North Korea make it harder to rein in Pyongyang than it might otherwise be. But they also mean China may have more clout than the U.S. on a key international challenge. That’s one more sign of growing Chinese influence that has many international observers uneasy. The director of Harvard's Belfer Center for Science and International Affairs, Graham Allison, joined Adam to discuss this dynamic, which he lays out in his new book "Destined for War: Can America and China Escape Thucydides's Trap?"