Someone showed a creationst this site and i was in the topic so i thought id check and it looks useful:
http://www.scientificamerican.com/article/15-answers-to-creationist/
Also found biologos.org a christian site explaining evolution to be useful.
My fav go to for arguing with people who have misconceptions abour evolution is this one its long but very well written:
http://evolution.berkeley.edu/evolibrary/misconceptions_faq.php
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