Quote:
Originally Posted by Jake T Catt
But then about point 4.
Maybe they got one whiff of what we're like, and they want nothing to do with us. (like in a Red Dwarf conversation: "Ewwww, that planet's got humans! yuck!")
Maybe we don't have the faster than light signal receiving "radios" so we can't hear them talking to us
Maybe they have an agreement not to communicate with species that haven't developed faster than light travel, a common sci fi idea (like in Star Trek)
Or, useful planets are so few and far between that contact between galatic races becomes almost impossible no matter how good the techonology, because it turns out the speed of light really is the limit, and it takes a galaxy's worth of energy to achieve it.
But wait, there's more! Maybe species evolved enough become pure energy, or go to a different dimension.
Someone's been watching too much Stargate. Oh wait it was me.
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Or maybe they were already here, found the planet unfit for life, and left before the first human even existed?
Humans have existed for such a short period of time in relation to th ehistory of even the planet, much less the universe. Whose to say they hadn't already come and left when it was still a big ball of molten rock?