Cofty: millions of christians manage to live with the tension between their faith-based beliefs and an acceptance of the facts of science.
This is an interesting observation. Anecdotally, and from my experience, I believe there are a couple of reasons for this. One, many people just don't care that much. They don't even realize there are inherent conflicts and contradictions between different ideas and beliefs they hold. And if you point it out to them they don't care enough to consider it because none of it matters that much to them. (This is true for all kinds of differing beliefs, not just religious ones). Most people just aren't that interested in doing the hard work of thinking things through.
For others, they have struggled with the conflict and have come to accept that sometimes there are things about which we will never have answers; and they have learned to live with ambiguity and unresolved conflicts. It certainly helps if they have abandoned a literal interpretation of the Bible as is clearly the case for many mainstream denominations of Christians.
It is one sign of a mentally unhealthy worldview that we must have an answer for everything. Black-and-white, all-or-nothing thinking is not good in any frame or context.