Peer review is a fundamental part of science. When a scientist wants to be published, the journal has anonymous scientific peers review the article to see if it should be rejected, modified or published. The article authors get to read these reviews. The journal "Nature," one the the top scientific journals, is doing a peer-review experiment in which after the normal review the paper is put online. Anyone can comment on the paper as long as they identify themselves. The folks at Nature will then evaluate the open reviews to see if they add anything. I can't wait to see the results!