That’s the title of a talk our friend and occasional contributor Jacob van Etten will give in the National Geographic store in Madrid next week, on the 28th to be precise. If you can’t be there in person, you can follow Jacob online. And if that doesn’t work, no doubt he’ll tell us here how it all went. I just hope he explains to National Geographic the difference between a potato and an oca. In fact, why not open with that, Jacob? That’ll grab their attention.