Comment Not much of a paradox, really. (Score 1) 315
It's not a paradox at all...It's a matter of phyiscs and time.
Think of it like this: The hallmarks of our presence, the environmental signature of rampant industrialism, has only been apparent for 250 years or so. We've only had radio for about a century. *AT BEST* the furtherest alien civilization that *could* detect us is 250 light years away. The Milky Way is 105.700 light years wide.
That doesn't even take into consideration that such a civilization should even know to look our way.
Why can't we detect alien civilizations? We face the same problems as above.