You nailed a thing I think many miss. Our signals will be static soon, and I don’t care what kind of magical tech aliens have. Static is static, truly random noise.
And as a civilization progresses, less and less need for EMF broadcast. Think fiber vs. AM radio. Maybe we’ll hit a tech point where, for whatever reason, we broadcast more EMF, dunno.
cynar@lemmy.world 8 months ago
The question is, how that trend develops. Right now, our footprint is dropping, due to efficiency improvements. At the same time, that might change again. E.g. large scale Comms between a home world, like earth, and other planets.
There is also the problem of older civilisations. Any approaching type 2 will be VERY visible, as the spectrum of their star changes. In terms of human history, we are a long way off. In ages of the universe scales, 10,000 years is practically a blip. We see no evidence of Dyson swarms or anything of that nature. An extra 13 billion years is a LONG time for no one to leave a detectable footprint.