What does this map tell us? Like the world-at-night maps, it shows us where all the people are -- at least those who are tweeting. Colors indicate the language used to tweet. Western Europe with its high population desnity is brightly lit up, with the Netherlands glowing especially bright. Eastern Europe: not so much. Notice the near-absence of tweeting in the Balkans (former Yugoslavia), even though a considerable number of people live there. Russia is a spider’s web of large cities connected through the darkness of the vast, empty countryside.
Source: http://bigthink.com/ideas/41004