I have never been able to find Biblical support for the concept of Original Sin, certainly not in the Garden of Eden story.
The idea that there is some original sin is more likely just an easy cop out to not have to deal with the reality that we are human.
The idea of "original sin" is not just theological nonsense, it is one of the most evil notions ever to grace the fevered mind of a shaman.
And no, evolution is not the work of satan. It is a scientific theory. It explains what we see in the natural world. If some folks don't like it, that's just too bad. It isn't going to go away.
/morning rant.
Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.