The changing shape of Lakes in the West of The United States

We live in a small world but we do compartmentalise our world and tend to only think of what surrounds us. Things change all the time and the familiar things change so slowly that we only recognise the extent of the change when, eschewing out faulty memories, we look at holiday snaps to show the way things were. Our cities change organically; if you were to visit New York after fifty years you would still recognise the place; London over the last few years has gathered some new buildings and some old ones have been repaired and cleaned up while others have ben torm dowm, but it is still recognisable as London.