“There is very little hope for life of any kind surviving the big crunch in a closed universe. However, one cannot be dogmatic about this as one does not know the limits of human ingenuity. If indeed the universe is closed, we probably have tens of billions of years to think about how to survive the big crunch, if it is not against the laws of nature that something should survive.” LifeUniverseNatureSurvivalHumanCosmologyBig Crunch Book:The Ultimate Fate of the Universe Source: The Ultimate Fate of the Universe
“Indeed, it is not clear whether it is meaningful to talk about 'after' the big crunch, just as it is not clear whether it is meaningful to talk about what happened 'before' the big bang. These questions are not necessarily meaningless, but the fact is we simply do not know.” ScienceUniverseCosmologyBig BangBig Crunch Book:The Ultimate Fate of the Universe Source: The Ultimate Fate of the Universe
“Supposing a new era begins after the big crunch, will the number of protons (or baryons) be the same in the next cycle? Will the protons retain a memory of their previous life in the earlier epoch of the universe when deciding to decay or not to decay? Will there be subsequent cycles of big bangs and big crunches? If so, will proton decay affect the cycles of the far future? There exist no answers to such questions at present.” UniversePhysicsParticlesBig CrunchProtons Book:The Ultimate Fate of the Universe Source: The Ultimate Fate of the Universe
“One of the most intriguing problems is to understand the precise nature of time, especially with regard to the big bang, the big crunch and the long-term future of an open universe.” ScienceTimeUniverseFuturePhysicsBig BangBig CrunchNature Of Time Book:The Ultimate Fate of the Universe Source: The Ultimate Fate of the Universe