Elon Musk finally explains the next big thing in transportation
                                
                                
                                    (Newser) -
                                    Elon Musk, the founder of Tesla Motors and commercial space company SpaceX, has finally unveiled  the "Hyperloop," his much-hyped new transportation system idea . And it's pretty far out there. It's a bit like a human shotgun, explains  Businessweek : people would sit inside aluminum pods, which would...