One compelling theory for why we have not encountered intelligent life is that any sufficiently advanced civilization will eventually stop exploring the universe and immerse themselves entirely in virtual reality, to the point that they harness the total output of their star for computation, and disappear.
Relativity means that the Star Trek vision of a galaxy spanning society is probably an incoherent fantasy. Why pursue expensive, dangerous, and disappointing adventures in the real world when you can conjure any conceivable reality with perfect verisimilitude?
Relativity means that the Star Trek vision of a galaxy spanning society is probably an incoherent fantasy. Why pursue expensive, dangerous, and disappointing adventures in the real world when you can conjure any conceivable reality with perfect verisimilitude?