Sigh still one huge planetary sized plot hole that needs to be filled based on this article. If Oryx and Crota aren't the darkness, who or what defeated the Traveler and caused the collapse? According to this article they came much later. And post collapse where did they go? And if this "Darkness" is so powerful, why has it not defeated other civilizations in the past? We are led to believe that Oryx and his kind have been responsible for destroying all those other civilizations.