They know where you live

In the exploding world of social networking science, we bring one of the more remarkable results we’ve seen recently: scientists at the University of Roch­ester who have been analysing heavy Twitter users have, without using GPS or any profile information, been able to locate them to within one city block with 90 per cent accuracy, using only information in the tweets and from friends. Similarly, using your location and your tweets, they can work out who your friends are with the same accuracy. This is great news for tweeters who want their privacy invaded by marketers, for example.