links
http://www.doubleyourdating.com/
http://www.johnkharms.com/evolution.htm
http://www.nel.edu/22_5/NEL220501R01_Review.htm
http://jrscience.wcp.muohio.edu/nsfall01/FinalArticles/TheNatureOfHumanAttractio.html
http://blogs.discovermagazine.com/discoblog/2008/09/23/dating-a-dud-blame-it-on-biology/
http://www.eurekalert.org/pub_releases/2008-09/plos-msm091108.php