An expanding sphere of civilization/technology, spreading outwards using von Neumann Probes or simple colonization. Judging from how most life behaves, it will gradually restructure matter and energy inside itself in various ways. Due to the finite speed of light it can only spread slo wer than lightspeed. [Mitchell Porter].

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An expanding sphere of civilization/technology, spreading outwards using von Neumann Probes or simple colonization. Judging from how most life behaves, it will gradually restructure matter and energy inside itself in various ways. Due to the finite speed of light it can only spread slower than lightspeed. [Mitchell Porter]

Source