In ancient Greece, the terms "happy" and "blessed" were synonyms, and were used to mean "doing well." And when are you doing well? It's when you're flourishing. And according to Aristotle, people who lead flourishing lives are "exercising immortality." Got it?

Billy and Doc discuss this and so much more, including the reaction of our ancient central nervous system to a new assessment category. We were designed to determine if another human was a threat and an ally. So how do we cope with all the people that are simply annoyances? We'll try to return a throw pillow to Home Goods to find out.

We don't just evolve biologically. Culture also contributes to our evolution, but somewhere along the way we became stuck in Uncanny Valley, where our weird feels familiar and foreign at the same time, and with that comes unease. But don't worry, the boys have a solution. And it goes back to old Aristotle. Or something like that.

If you place the entire history of the cosmos, from the Big Bang until now, onto a single calendar year, the first humans don't arrive until 10:30 on Dec. 31. Everything we know about, everything in our history books, happens in the final 10 seconds, of the final minute, on the last day of the calendar. This show is about those 90 minutes.