I particularly like this bit Nibble,
/He sees the pope as using "both faith and reason" in his efforts to bring the life of Jesus closer./
A powerful combination, guaranteed to find the 'correct'answer' to any question.
If you actually go to Bethlehem, you'll find the "birthplace" is a cave. It is quite a feat of gymnastics for a mere human to squeeze in and down the steps, so you can be sure no animal much bigger than a rat could have done it. If no animals, then no manger, since that's a container for hay.
But you can't help wondering how a woman in labour ( or at least a heavily pregnant woman with a very swollen belly) managed to get down there.