The full versions are press releases we get from universities and the like. The summaries with links to full stories are copyrighted (or not, as some site editors do the same press release cut and paste as our automated service does).
We scrape them, and the universities and other organizations are pretty happy about it, we often get email saying thanks, links from professors and emails asking how much views they received, etc. These would get no exposure at all without sites like e! science news.
