The location of debris from the Malaysia Airlines flight MH370 in the southern Indian Ocean would eliminate some of the wilder theories about what happened to the plane and would lean towards the likelihood of an emergency on the flight, an attempt by the crew to turn back and complications that caused them to fall into unconsciousness leaving the plane on a ghost flight until it ran out of fuel.
The location also seems to rule out the hijack theories, because there are no airports along the southern flight path.
Far more plausible is the theory, favoured for days now by professional pilots on chat sites and blogs, that the pilots had an event on board that took out the communications and led to a slow or rapid decompression which rendered the crew incapable of making an emergency landing. Pilots have only a few minutes to bring a plane down to below 4000 metres before the passengers and crew will become disoriented, then unconscious and eventually die.