I am a scientist. I am a Christian. The two are not mutually exclusive.

I do not believe evolution to be fact. For that matter, science doesn't either - it is only a theory after all.

I do believe that God created the world and everything in it. God also created time, so doing it in seven days is not beyond His capabilities.

Personally, I think it's very presumptuous of us to limit God's abilities and say it's not possible for Him to have created the world in such a short time...

I don't know whether this has fully answered your question or whether my perspective is too Christian to be of much use to you.

BW