MADRID | The Corner | Right now, you are sitting on your desk and plan to grab a sandwich from the vending machine, then consider investing on a stock. Your plans are clear. But do you know why you know that? Neuroscientists John O’Keefe, May-Britt Moser and Edvard Mos are the discoverers of that mechanism, our brain’s GPS, or cells that form a positioning system in it. They were awarded with the Nobel Prize of Medicine on Monday in Stockholm. Their research could mean advances in the Alzheimer research.