Ok, so maybe not a "fact" but the hypothesis of the False Vacuum: https://en.wikipedia.org/wiki/False_vacuum https://en.wikipedia.org/wiki/False_vacuum This q

Ok, so maybe not a "fact" but the hypothesis of the False Vacuum: https://en.wikipedia.org/wiki/False_vacuum https://en.wikipedia.org/wiki/False_vacuum This quote blew my mind: "The possibility that we are living in a false vacuum has never been a cheering one to contemplate. Vacuum decay is the ultimate ecological catastrophe; in the new vacuum there are new constants of nature; after vacuum decay, not only is life as we know it impossible, so is chemistry as we know it. However, one could always draw stoic comfort from the possibility that perhaps in the course of time the new vacuum would sustain, if not life as we know it, at least some structures capable of knowing joy. This possibility has now been eliminated." I immediately went out and bought Greg Egan's "Schild's Ladder" after find out he'd used this as a plot device.