[quote]how does all the light stuff work? [/quote] We don't know. It could just be the energy that the Traveler gives off and allows us to do all this crazy stuff. [quote]why cant ghosts of other guardians resurrect a different guardian?[/quote] As far as we know, Ghosts are bound to only one Guardian, but the link between Ghosts and Guardians is still something widely unexplored. [quote]did the traveler also chose its own speaker?[/quote] Nah. The Speaker just had the ability to interpret the Traveler... supposedly. [quote]is the speaker for the traveler a guardian? [/quote] Nope. [quote] is the light more than just a source of power for the guardians?[/quote] The Light does way more than power Guardians. It's essentially the energy that fueled the Golden Age before the Collapse. [quote]do cats exist?[/quote] Yes. You can see them in the Tower.