British-American researcher John O'Keefe today won the Nobel Medicine Prize with a Norwegian couple Edvard Moser and May-Britt Moser for discovering how the brain navigates. They won the coveted prize for discovering an 'inner GPS' which makes it possible to orient ourselves in space the jury said. 'The discoveries of John O'Keefe May-Britt Moser and Edvard Moser have solved a problem that has occupied philosophers and scientists for centuries' it said. 'How does the brain create a map of the space surrounding us and how can we navigate our way through a complex environment?' In 1971 O'Keefe discovered the first