By following the links and discussions, you can get pretty deep into it; down to the published papers in respectable journals and granted patents. But be warned, there are a lot of crack pots that pollute the matters (as expected for this category). So you have to take what's good, and throw away what's bad. But it does give you a different perspective on things.
http://peswiki.com/index.php/Main_Page
http://pesn.com/
By following the links and discussions, you can get pretty deep into it; down to the published papers in respectable journals and granted patents. But be warned, there are a lot of crack pots that pollute the matters (as expected for this category). So you have to take what's good, and throw away what's bad. But it does give you a different perspective on things.