Blame a giant, underground rock in New York and Pennsylvania
                                
                                
                                    (Newser) -
                                    If you took a bird's-eye view of the Appalachian mountain chain, you could pretty much trace a 1,500-mile straight line from Newfoundland to Alabama, notes  Nature World News . Except, that is, for a little squiggle in New York and Pennsylvania. So what on earth could make a mountain...