You know, I wonder whether other journals will follow the format of Nature news, and have a section for comments at the end of the article. THose can be left failry anonymously, and by anyone, and occasionally interesting discussions follow. Right now, it's just the news summary articles, not actual research articles that have this feature but there's no reason why it couldn't be done with research papers. Just like a worldwide journal club, you know?

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"The only abnormality is the incapacity to love"
-Anias Nin