At Facebook's f8 developer conference, Chief Executive Officer Mark Zuckerberg promoted the new feature, a blog-like presentation that let users scrolls vertically through the big moments of one's life.

　　"It's how you can tell the whole story of your life in a single page," said Zuckerberg, showing his Timeline which started from a baby photo.

　　Zuckerberg assured users that they have complete control over their Timeline, saying that they can decide what content will appear and who can see it. The new feature will be available in a few weeks.

　　Half a billion people are using Facebook in the world everyday, according to Zuckerberg.