Hi Dansk;
I know Alan was limiting his statement 'Furthermore, they only work sometimes and on some people', which is why I did mine '(in terms of changing a recipients body chemistry)'.
If someone takes an Asprin, you can see it in the body. If someone has accupuncture, you can see it in the body; that doesn't mean that either the Asprin or the accupuncture will work from the patient's perception.
As regards evolution, start here;
There is no easy method to getting to grips with the evolution vs creation argument other than sitting down and reading for quite a while.
I would recommend you look through a Biology text book for either 'A' level or University. I don't know what your educational background is. If you can read and understand stuff like photosythesis or metabolic pathways at those levels, then you will be more able to form your own opinion regarding the arguments made in the evolution vs creation debate.
If you can't comprehend stuff at that level (yet), then you will be more dependant on the author's conclusions when you read an article, rather than your own evaluation of the argument. I think we've all been dependant upon other peoples' conclusions for far to long to go down that path again! Of course, the way to solve a lack of comprehension is sitting down and reading stuff so you CAN form your own opinion.
I say this as I know ten years ago I could have read some articles that would have me thinking 'wow, great argument' that I would now pull to pieces. Just guard yourself so you can see the weaknesses in both the creationists' and the evolutionists' argument.
Funnily enough, in the arguments here on the subject, creationists very rarely if ever hit on the major weak points of evolutionary theory, just bits they think are weak 'cause they don;t understand the bloody argument.
I would love a creationist to come along with a really good argument on one of the weak points of evolution, but for the most part they are tilting at windmills or fighting unwinable battles.