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You mean like what if species at a certain level of development start fucking around with zero point energy and trigger false vacuum decay?
Actually it's entirely possible it's already happened. There are lots of galaxies so far away their light will never reach us if it's emitted now, and vacuum decay travels at the speed of light AFAIK
Nonbinary btw
That's exactly what I mean. Like, even if a civilization set out at near-light speed a long time before triggering a vacuum decay, the decay would just catch up to them and wipe them out before they could reach us. It's a theory absolutely rife with holes, but it's an interesting possibility.
I'll gladly accept nonbinary!