If you are serious about building knowledge, the first thing, you will have to visit the sites which provides correct and detailed news. Recently I found this site jorbit.com with lakhs of news from all over the world. Also collects the news from other news sites, so that lakhs of news are available in one news site. This is the one site that utilized RSS technology at its best. News are displayed by country, so we can easy to find regularly updated news from this site.