This week on Flightless Bird, David sets out to discover why Americans love burgers so much, eating 50 million of them a year. Joined by Monica, he tries to figure out why in America it’s always beef for dinner and how that fact has drastically altered the biology of the humble cow. David talks to Ben Wurgaft, author of “Meat Planet: Artificial Flesh and the Future of Food” about the triumphs and problems of creating artificial meat. David also talks to Isha Datar, executive director of New Harvest, about the realities of feeding 8 billion people on earth each year using meat grown in giant vats - and asks whether it’s all just hype. We also discover what Dax Shepard and Kim Kardashian have in common - and yes, it’s related to meat.