Well, there is a variety of reasons. Still those that can be very easily seen by just everybody, are very obvious:
1. Religion is supposed to deal with the Cause.
Religion has NO PROOF OR EVIDENCE OF ANY KIND HOWEVER.
2. Science is supposed to deal with the visible world...
And I also know for sure that Everything in this Universe is created and comes from ANOTHER PLACE.
Everything - the Universe itself, the Earth, humans, God. Yeah - even God, you know - lol ;)! And Not just This God BUT ANY GOD!
And I don't want to take away people's faith...