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Not all aliens, but generally we're only concerned with aliens that could potentially affect us. Since we can't travel that far away from our planet right now (
by NhanH 13y ago
Not all aliens, but generally we're only concerned with aliens that could potentially affect us. Since we can't travel that far away from our planet right now (and we know that there seems to be no life capable planet nearby - with a loose definition of "nearby"), any alien that we can meet right now would have to be quite a bit more advanced to us.
- mtdewcmu 13y agoThe aliens haven't found us. I think the best hope of contact is if we develop interstellar travel first and go looking for them. I think the premise of the paper depends on mankind possessing this technology.