Your brain differs from mine (Introduction)
by David Turell 
, Monday, January 16, 2012, 20:41 (4696 days ago)
Atheist brains and theistic brains have different regional sizes and also general chemical differences. Research only partially complete:
http://www.scientificamerican.com/article.cfm?id=is-there-a-difference-between-the-brai...