Since its launch less than a decade ago, Facebook has exploded. Today, more than 750 million people belong to the site, sharing photos, status updates, and links with their Facebook friends. The site has even changed how we talk, adding new meanings to the words "friend" and "like." We've seen other social sites rise and fall, but maybe Facebook is different; maybe it's here to stay.
Rebecca J. Rosen is a senior editor at The Atlantic, where she oversees the Family and Education sections.