20. Waiter, There’s a Physicist in My Soup! (Part 2)

21. Bring on the Pain!

22. Why Cities Rock

23. Millionaires vs. Billionaires

24. The Power of Poop

Two (Totally Opposite) Ways to Save the Planet (Ep. 346)

Pick of the Week: The Cheeseburger Diet (Ep. 230)

Pick of the Week: The Demonization of Gluten (Ep. 304)

Pick of the Week: How to Save $1 Billion Without Even Trying (Ep. 178)

Pick of the Week: How Can This Possibly Be True? (Ep. 236)