Fancy explaining it to a non-lay person in a way that is physically accurate? I must have been asleep in that lecture.
What do mean by "it" in that context? I used the article to mean aerodynamics as a whole, and I think you'll agree that might take a while...
Circulation isn't really what is happening - it isn't an attempt at an explanation for lift, it's just another tool used in design to calculate values that we wouldn't be able to otherwise.
Eh? Not really happening?? Of course it's really happening. How do you explain how the calculated values are correct if it's "not really happening"?