The new Facebook layout has been announced, which is aimed to focus more on the posts and stories from people you more care about and also to reduce clutter.
The new Facebook design is more clean and more user-friendly (at least to me). The design is also responsive, if your browser's screen size is above 1220px width the left navigation menu is wider while with below 1220px you will have a short version of it. The left hand side navigation is more clean and easier to use. Its dark background color also makes it more eye-catching while the content design (posts and stories) has the main attraction.
Read more on this at http://schahryar.blogspot.com/2013/05/new-facebook-design.html