How can you break a bad habit if you’re not aware that you’re doing it? Does Barack Obama grind his teeth? And is Angela’s dentist a crook?

124. How Do You Stop Grinding Your Teeth?

Research psychologist Angela Duckworth (author of "Grit") and tech and sports executive Mike Maughan really like to ask people questions, and they believe there’s no such thing as a stupid one. So they have a podcast where they can ask each other as many “stupid questions” as they want. New episodes each week. "No Stupid Questions" is a production of the Freakonomics Radio Network.

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192. Should You Get Out of Your Comfort Zone?

Are you the same person you were a decade ago? Do we get better as we age? And is your sixth-grade class clown still funny?

191. Can You Change Your Personality?

Is it dangerous to live in the past? Why is Disney remaking all of its classic movies? And why does Angela get sentimental over a cup of soup and a free roll?

190. What’s the Point of Nostalgia?

Does instinct trump expertise? Can playing poker improve your intuition? And why did Angela jump off of a moving trolley car?

189. When Should You Trust Your Gut?

Is grade inflation on the rise? How much does your G.P.A. matter in the long run? And when did M.I.T., of all places, become “the cool university”?

124. How Do You Stop Grinding Your Teeth?

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