And one more thing to keep in mind: the Catholic Church officially doesn’t believe in historical truth of the stories of Noah, Adam and Eve, etc., only that they tell spiritual truths. This is actually would make the New Testament untrue, among other things, because it speaks historically of Jonah, for example, and lists genealogies for Jesus. And it makes God less than He is.
Absolute balderdash. Straight from Humani Generis:
In a particular way must be deplored a certain too free interpretation of the historical books of the Old Testament. Those who favor this system, in order to defend their cause, wrongly refer to the Letter which was sent not long ago to the Archbishop of Paris by the Pontifical Commission on Biblical Studies.[13] This letter, in fact, clearly points out that the first eleven chapters of Genesis, although properly speaking not conforming to the historical method used by the best Greek and Latin writers or by competent authors of our time, do nevertheless pertain to history in a true sense, which however must be further studied and determined by exegetes; the same chapters, (the Letter points out), in simple and metaphorical language adapted to the mentality of a people but little cultured, both state the principal truths which are fundamental for our salvation, and also give a popular description of the origin of the human race and the chosen people. If, however, the ancient sacred writers have taken anything from popular narrations (and this may be conceded), it must never be forgotten that they did so with the help of divine inspiration, through which they were rendered immune from any error in selecting and evaluating those documents.
"Officially", Faith, the Catholic Church assumes the historicity of those parts of the Bible which are meant to be historical, while acknowledging that allegorical and other interpretations are possible depending on what the sacred author wanted to convey.
The same document states that original sin "proceeds from a sin actually committed by an individual Adam and which, through generation, is passed on to all and is in everyone as his own."