Rant: Not linking to the source article is a crime conmited by many outlets trying to report on science. I do not understand that practice. It is even worse when the researcher's institution does this in a public press release (MIT is consistently guilty of this). Are these people afraid that their watered down "explanations" are so wromg that even a cursory glance over the paper will show this?
Some news sites such as Ars Technica provide the links. They even have agreements with major publishers that allow them to bypass paywalls and provide their readers with links to the the published full text as well.