1. Our understanding of the scientific data is incorrect.
2. Our understanding of the Biblical data is incorrect.
3. Both 1 and 2.
What bothers me is that option 1 is generally the only acceptable option, at least in the conversations I've had with the pastors and teachers at my church. There seems to be a basic denial of the the fact that the words of the Bible (biblical data) must be interpreted to be understood.
When I asked my pastor who gave a sermon on this topic what we should do about the cases where science clearly teaches something contrary to "what the Bible teaches", he answered this way:
"I believe that where they disagree the Bible has it right. It may take science a while to catch up and has from time to time but I go with the Bible."
With all due respect, this seems completely crazy to me. The implication that we can't possibly be wrong about our interpretation of the Bible seems arrogant to me. Now, call me a heretic if you wish, but given the obscure nature of the biblical texts, and given equal time and effort studying the data, might we be MORE likely to be correct in our conclusions about scientific data, than about biblical data?
Is there some mystical force guiding our interpretation of the Bible, and not of science? Some may reply: "Yes! The Holy Spirit!" But if the Holy Spirit is a significant force in guiding Christians in their interpretation of the Bible, then God is intentionally sowing confusion in His church. The reality is that Christianity has an incredibly diverse array of beliefs (all based on biblical interpretation), and they can't all be right.
“In matters that are so obscure and far beyond our vision, we find in Holy Scripture passages which can be interpreted in very different ways without prejudice to the faith we have received. In such cases, we should not rush in headlong and so firmly take our stand on one side that, if further progress in the search for truth justly undermines this position, we too fall with it.” -Augustine, in De Genesi ad litteram, 415AD. [source]
"If a position is true, every avenue of reflection ought to point in its direction." -Greg Boyd [source]