This picture was taken on the 27th of November by a number of NASA satellites. it shows all the inhabited and uninhabited regions of the world. the amount of light seen represents the development or underdevelopment of the region. the world nearly light up in the three main developed areas: North-America, Western Europe and Japan while the south is mostly in darkness (except for more developed areas such as Australia, South Africa and Brazil) but you must not forget the natural boundaries too, like the Sahara's and the rain forests. it's interesting how the population of China is so unevenly distributed, on the other hand how India's pop.. is even. it also interesting to observe how 25% of the 6 billion in the world live along the coastlines. other that physical features, its interesting how the river Nile literally glows, and how dark it is around it, plus the great difference between North and South Korea. well these are just some of the things you can get out of this picture.....you can analyze it more if you wish!