Facebook on Thursday starts to roll out Timeline feature worldwide, replacing the current profile page to give more than 800 million users a new way to show their lives. In its official blog, Facebook said users can wait for a notification at the top of their profiles or go to \"facebook.com/ about/timeline\" to get the feature right away. All profiles of Facebook users will be switched to the new look eventually. The world\'s largest social network also gives users seven days to review everything that appears on their Timeline which will go live automatically after seven days.Timeline features milestones of one\'s life on a single page, a blog-like presentation that let users scrolls vertically through the big moments. \"It\'s how you can tell the whole story of your life in a single page,\" said Facebook CEO Mark Zuckerberg, who introduced the feature in September starting from his baby photo.