WONDER YEARS

Facebook Launches 'Timeline'

Facebook is not going back to the future—it just thinks that the future is in the past. The social network officially launched its "Timeline" design Thursday. It lets users revisit important stories since they joined the site. The feature was announced in September and test runs were available for some users, but the network's more than 800 million members will be able to convert their profiles today. Productivity at your office is expected to plunge.