Answers:
1: It rained for 40 days, but I think the floodwaters stayed much longer.
2: Not long I imagine. Then again, god said 'every living thing' would be destroyed.
3: Not at all probably. Then again if there was a global flood that altered topography and created oceans, then saltwater oceans as we know them didn't exist yet.
4: Pretty much all researchers agree that civilization began to record their history only less than 5,000 years ago, and for some reason the humans in the thousands of years before that didn't.
5: I don't know what dates researchers placed on the artifacts they discoved there.
6: It's called the Berring Straight (I think, not sure), anyway, it's the land passage between Russia and Alaska that has since broken off. That's why native Americans look similar to Mongolians, a mixture of western European and Oriental.
Maybe Jeramy has different ideas, maybe not.