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DarthGinsu t1_iyaju73 wrote

Reply to comment by geniusgrunt in Extragalactic SETI looks for life beyond the Milky Way. But where? In game theory one solution is a Schelling point — a single event that draws different group's attention. A binary neutron star merger could act as one, because observers across the universe will all be looking in the same direction. by EricFromOuterSpace

Civilizations could have already occurred or haven't yet. If we don't settle other worlds, the mantle of earth will eventually gobble up all evidence of our own existence if we aren't around by then. Applying that to a "Past" civilization on Earth is moot as well due to it being impossbile to find the evidence of such an outstanding claim.

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