Facebook is the top social network in 127 of 137 countries studied in areport by the Los Angeles Times. The remaining ten countries in which Facebook is not ranked top include: Russia, which predominantly uses Kontakte and Odnoklassniki; China, due to QZone, and Iran, led by Cloob. Despite not ranking top in China, the biggest growth by area has been seen in Asia, which now has Facebook's largest population with 278 million users. Europe currently has the second largest, with 251 million of Facebook's billion users. Read more...