You are aware that the Pope is not the leader of all Christians, right?
Catholicism doesn't have a real problem with Evolution/Big Bang.
You're thinking of those Protestants (Evangelicals are the loudest) who believe the bible in literal terms.
That is the point that is ironic to me. Couple of centuries ago, protestants were burned at the stake for "straying away from the path of true Christianity" and allowing different interpretations to Christianity than the Catholic church's. The protestants were progressives who thought religion should not be interpreted in only one way, thus allowing the introduction of science alongside religion.
Now, as Jorge says, some Protestants seem to be more fundamentalist that Catholics, who used to be more extreme in their faith.
Now that even the Pope, the symbol of Christian dogmatism and authoritarianism, acknowledges that the scriptures are not incompatible with science, there are Protestants who won't acknowledge that? It's the irony that entertains me.