I meant to write a commentary on this at the time, but it just kept getting shuffled down the stack as other topics intervened. Last year's Nobel Prize for Physiology or Medicine was shared by Professor John O'Keefe, University College London, for his work on understanding how the brain maps the world around us so we can navigate. He jokingly claims he was looking for the soul of the rat when he discovered 'place cells'. It has now been found by Edvard and May-Brit Moser, that these 'place cells' form a grid of recorded coordinates.
We have known for some time that the hippocampus is involved since a UCL team led by Eleanor Maguire found that as London Taxicab drivers acquire 'The Knowledge' their hippocampus enlarges. 'The knowledge', for those who haven't heard of it is the detailed street knowledge London Black Cab drivers must demonstrate before they qualify for their licence to operate.