If the atmosphere was THAT saturated, surely it would have all poured back down again in a whopping great rainstorm and we'd have had our oceans back (probably a little higher than we'd have liked, too, 'cause yeesh, talk about global warming)? Instead, the Earth here has none, so it was probably a little more extreme than that. And you may be right about the scientists, but while it would probably be easy enough to synthesize water, you'd have to mass-produce it in mammoth quantities heretofore unheard of - quantities I'm not sure are even possible. Think about how many people there are on Earth, and how much water they drink - we're talking uncountable thousands of gallons on a daily, even hourly, basis; you'd have to have every factory on Earth pumping it out nonstop for weeks before they even got a chance to slow down. And all that's assuming that they didn't run out of the necessary materials before then. Earth may be a largely industrialized society, but I'm not sure we'd be capable of producing that much of a hitherto unneeded (because it was present in nature, I mean) product on such a short notice.