It’s a serious question.
It seems to me very much that people who deny evolutionary theory and the Big Bang do so out of a motivation to preserve their religious beliefs, which are often based on assumptions that the Bible (or Quran or other holy book) describes literal truth.
It seems to me that science is now at the point where no serious and objective look at biology, physics, cosmology, and geology can come to any conclusion other than that the development of our universe began with a Big Bang (which modern physics still cannot explain), and that human beings are the evolutionary descendants of single-called organisms.
I am a practicing Roman Catholic who believes in our divine origins, the Resurrection of Jesus Christ, and the ultimate resurrection of those who love him on the Last Day. I do not contest any part of the Catechism of the Catholic Church in addressing these questions.
I’m not posting this to debate the science. As far as I’m concerned, there is no objective way to contest these conclusions. As such, I would like to ask whether a Catholic may deny evolutionary theory, Big Bang theory, and the geological history of planet earth without committing a sin.
In particular, I see two sins which are possible in denying scientific theories that the overwhelming majority of scientists in the respective fields accept as the best possible explanations of observations available to us. First, I think that it is possible that denying these theories after examining all available information may be dishonest. Second, I think that constructing a set of religious beliefs that rely on denying scientific theories may be a form of idolatry, in that it sets up a faith contingent on human desires, not divine instruction.
In raising these questions, I am not saying that science “has it all figured out.” Far from it. String theory is a lost morass. Cognitive neuroscience lacks a mechanistic explanation of human consciousness. We cannot explain why the search for extraterrestrial intelligence has so far found no confirmation of intelligent life outside of earth. However, each of these questions is amenable to further scientific inquiry. As such, I am comfortable with uncertainty in scientific understanding of the world.