Can Life Exist in the Universe or Multiverse After the Big Crunch?

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Discussion Overview

The discussion revolves around the possibility of life existing in the universe or multiverse after a hypothetical Big Crunch event. Participants explore various theoretical implications of the Big Crunch on the existence of life and the role of tachyons in this context.

Discussion Character

  • Debate/contested, Conceptual clarification, Exploratory

Main Points Raised

  • Some participants argue that after the Big Crunch, the universe will shrink to a point where known physics disintegrates, suggesting that life cannot exist.
  • Others introduce the concept of tachyons, questioning their relevance to the Big Crunch and whether they could exist in such a scenario.
  • One participant posits that if tachyons exist, they would still be part of the universe, which would end with the Big Crunch, reinforcing the idea that life would not persist.
  • A later reply speculates on the nature of tachyons and their relationship to space-like world lines, suggesting that the singularity of the Big Crunch is not part of space-time, leading to the conclusion that life cannot exist.

Areas of Agreement / Disagreement

Participants generally agree that the Big Crunch would lead to conditions unfavorable for life, but there is disagreement regarding the implications and relevance of tachyons in this context. The discussion remains unresolved regarding the role of tachyons and their potential existence in relation to the Big Crunch.

Contextual Notes

Participants express uncertainty about the nature of tachyons and their implications for the Big Crunch, with some assumptions about the behavior of particles under extreme conditions remaining unexamined.

Hawking14
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After the Big Crunch, will the universe or multiverse support Life?
 
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Well, considering that it is a Big "Crunch" and that the universe will have shrunken down to a point that all known physics disintegrates, I'd say no.
 
Lamdbaenergy said:
Well, considering that it is a Big "Crunch" and that the universe will have shrunken down to a point that all known physics disintegrates, I'd say no.
Then what about Tachyons?
 
Tachyons?
I'm honestly not sure what those kinds of particles would have to do with the collapse of an entire universe.
 
I guess,Nothing! But there must be something like Tachyons having v=c... Right?
 
Hawking14 said:
I guess,Nothing! But there must be something like Tachyons having v=c... Right?

Tachyons are particles where the case of v > c always applies. Their velocities are always faster than c and they are forbidden from traveling any slower.
 
Oh Yeah, I forgot that... Sorry :)
 
Hawking14 said:
what about Tachyons?

If they exist, they exist within the universe, and if there's a Big Crunch, the universe ends, along with everything within it. So the answer to your question remains "no", as Lambdaenergy said.
 
Let me venture a guess. You think of the tachyons as having space-like world lines. And since the final singularity of the big crunch is space-like it might contain space-like curves i.e. tachyons. But the singularity is not part of space-time so the answer is no.
 
  • #10
Thank you all for your answers! It helped me a lot... :D
How to close this thread ? Mentors please close this thread...
 

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