[techcor]

Well, if the stars start going out or getting real dim, then a stellar civilization has started creating a Dyson Sphere (really a swarm). That would be one indication of a species or civilization that would exist and hardly notice us.

Species and civilization might evolve and turn into themselves by using nanotechnology and creating virtual worlds. Why go to another star system if everything you want you can create?

[Physicist]

Species and civilization might evolve and turn into themselves by using nanotechnology and creating virtual worlds. Why go to another star system if everything you want you can create?

I sincerely think that this is the correct answer to the Fermi problem. There's always room at the bottom, as Dick Feynman used to say.