Half Of Your Friends Lost In Seven Years

Interesting results in a study about friendship

Personal networks are not formed solely on the basis of personal choices. These choices are limited by opportunities to meet. Another strong indication for this came from the fact that people often choose friends from a context in which they have previously chosen a friend. Moreover, the extent to which our friends know each other strongly depends on the context in which people meet each other.

via Half Of Your Friends Lost In Seven Years, Social Network Study Finds.