SETI Technosignatures We May Not Want to See Compilation

1)Necrosignatures
One type of SETI technosignatures that we aren’t very likely to ever see
2) Galactic tombstones
Imagine you were an advanced alien from an advanced civilization that it’s about to turn the lights off because of a fatal error it made, and wanted to give some warning signs to other civilizations out there
3) Incomprehensible signals
Imagine if you were a human from 5000 years ago and someone handed you a computer
4) Messages from dead universes and beyond.
Have you ever heard of the theory stating that this we’re living in is just one of the infinite series of repeating universe?
5) Vanishing stars
Nowadays, we are collecting samples from the moon and from comets, such as the Rosetta mission and the Hayabusa Japanese Mission!
6) Nicoll- Dyson Beam

Luckily, for what we know at the moment, the Milky Way is a peaceful galaxy.
7) DNA Seti
8) Self Replicating Spacecrafts
Say an alien civilization (or us) wanted to mine an entire asteroid or moon. It would be a large-scale mining operation. This is not sci-fi, because we all know that, at some point, we’ll have to go and search for new materials on other celestial objects, rather than the Earth: resources are finite!
9) The closing in signal
We are used to imagining that, if we ever detect an alien signal, it would be from a thousand light-years away.

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