There's lots of RSS news feeds out there but here's some suggestions:
http://news.google.com/?output=rss
http://rss.cnn.com/rss/edition.rss
http://mf.feeds.reuters.com/reuters/UKWorldNews
http://www.nytimes.com/services/xml/rss/nyt/International.xml
http://feeds.bbci.co.uk/news/world/rss.xml
http://feeds.newscientist.com/science-news
http://feeds.theguardian.com/theguardian/uk/rss
There's also a nice list of feeds here:
http://www.thefreedictionary.com/_/rss-directory.htm