Tower of Babel has always intrigued me. What were they actually building that they thought they could reach heaven with it? These weren't stupid people, and certainly they must have realized that it was not possible with a normal building to get that high. Or perhaps they did devise some architectural plan that they believed would allow them to get up there. Of course, none of it makes any sense if in fact "heaven" is really the vacuum of space. And God struck down the tower while stating (according to Genesis) that they would not give up until they had in fact accomplished what they had set out to do.