Originally Posted by sgaana
At the start of the movie, they also lampshade this -- I think one of the arriving SHIELD agents (if that's who they are) says something like, "Why wasn't this found before?", and the guy who was there to greet them responds with, "this landscape is changing all the time".
Not only did the ending show the Wing settling/melting into the ice, but snowstorms would have soon covered all of the wreckage and the scars of the crash.
Ya, I was telling Marvin about that comment in the beginning of the movie a few days ago .... he didn't like that answer either. LOL.