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Originally posted by T0by
Maybe all aliens are girls and they just like the pretty lights.
Hm nah but really it's pretty hard to say, just like cavemen would wonder why we walk around the street talking into rectangles (phones). they'd never guess in a million years
But hey, the answer could be simple.
It could be either to see where they're going, some kind of energy related thing, or a form of exhast.
Originally posted by WithinyouWithoutyou
Mabye there is an interstellar law requiring the use of turn signals?
Seriously though, given that we know next to nothing regarding alien tech, it is possible that the lights that are witnessed are simple byproducts of these crafts propulsion system...an extra-terrestrial smoky tail-pipe.
Originally posted by craig732
I always felt the same way about the USS Enterprise on Star Trek. Why do you need flashing lights on it? So another space ship doesn't hit it when it is travelling at warp 5?