As an agnostic, I'm open to anything, but the story of Noah's Ark really seems to be a mythological interpretation of the floods many of the early river valley civilizations would experience during large rainstorms. In fact, an almost exact copy of the story of Noah can be seen in the Epic of Gilgamesh, written around the same time as the Old Testament. Not only that, but it was certainly impossible for one man to bring all the species of the Earth onto one boat, considering that no one in the Middle East knew anything about the western continents.
Noah didn't bring the animals to the ark, the animals came to Noah:
Gen 7:8-9 Pairs of clean and unclean animals, of birds and of all creatures that move along the ground, male and female, came to Noah and entered the ark, as God had commanded Noah.
So I guess the North American moose population swam across the great seas to Noah's house. Can we come back to reality yet jm?