Please don't read this if your religious beliefs are likely to be threatened by logic and facts.
http://www.patheos.com/blogs/wwjtd/2012/02/prayer-absolutely-positively-does-not-work/
I'm less engaged by the one off example, than the 'whistling lawn mower' analogy
http://www.patheos.com/blogs/wwjtd/2012/02/prayer-absolutely-positively-does-not-work/
I'm less engaged by the one off example, than the 'whistling lawn mower' analogy