Maybe Noah only preached to his wife and children, I seem to remember that it was taught that Noah had 120 years to build an ark, he took the instructions from God and did just so, so he wouldn't have made any plans to build it bigger. I wonder what kind of gps system he had to located all the varous islands and countries of the world and drop off animals in them so they would be specific types for their enrvironment????/ It's a myth, if not it had to do with a local flood, even in Josephus it talks of others who came dowq from the mountains.
In book 1 Antiquities of the Jews, Chpt 4 The first several sentences read:
"Now the sons of Noah were Three, __Shem, Japhet, and Ham, born one hundred years before the Deluge. These first of all descended from the mountains into the palins, and fixed their habitation there; and persuaded others who were greatly afraid of the lower grounds on account of the flood, and so were very loth to come down from the higher places to venture to follw thier examples."
Now that seems to lend credence to the fact that the flood in all actually was very local if not who were the others, you mean that Noah's family lived upon the mountain until they had many children and these when they grew up were afraid to come down. Like I said Mythical.