Why is our universe fine-tuned for life? - Brian Greene [TED Talk]

Replies

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  Oceanliner

  I absolutely loved this talk. Probably a great deal simplified for us mortals but the philosophical points is well worth to spin your head over.
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  silverscorpion

  Wow!! Absolutely brilliant!
  
  The implication that he talked about at the end of the talk, is especially worth pondering.
  
  The implication is that, in the future, after the galaxies have drifted apart a long long way, the astronomers at that time will only be seeing a static universe filled with darkness and assume that the universe is indeed static, despite the availability of results from our period, because we would then be ancient and they probably won't believe in ancient scribblings.. Now, this makes me think.. We have not been greatly appreciative of our ancient scientific knowledge either.. Whatever explanation we give for their non-merit, isn't it possible that they saw something we don't? Interesting thought!! 😀
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  shreyasstar

  Amazingly Brilliant...
  The idea of Multiverse is quite fascinating. Though imagining the existence of other universes (probably a billion more) do arise certain questions.
  eg.1) What contain those universes ?
  2) If there are multiple universes, it is only right that the universes must have a definite size (because if they could expand, they would collide with each other) and if they have fixed size then how come the universe expands ?
  3) Considering other universes have a different structure for other dimensions, there is a possibility that those universes contain life systems governed by different laws of physics, laws completely different from ours. So does this mean that our laws are not universally applicable ?
  
  It is still unclear if multiverse exists but many religions base their understanding of heaven and hell and afterlife on existence of multiple universes.
  And as far as our existence is concerned, we MAY just be at the right place at the right time.
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  Pensu

  Absolutely Brilliant. I actually liked the idea of multiverse. It does make sense. We have been limiting our thinking to one universe only and there is a pretty good chance that there are other universes in existence. I really wish, one day someone could confirm it with some solid proofs...😀
• 

  silverscorpion

  shreyasstar

  Amazingly Brilliant...
  The idea of Multiverse is quite fascinating. Though imagining the existence of other universes (probably a billion more) do arise certain questions.
  eg.1) What contain those universes ?
  2) If there are multiple universes, it is only right that the universes must have a definite size (because if they could expand, they would collide with each other) and if they have fixed size then how come the universe expands ?
  3) Considering other universes have a different structure for other dimensions, there is a possibility that those universes contain life systems governed by different laws of physics, laws completely different from ours. So does this mean that our laws are not universally applicable ?
  
  It is still unclear if multiverse exists but many religions base their understanding of heaven and hell and afterlife on existence of multiple universes.
  And as far as our existence is concerned, we MAY just be at the right place at the right time.

  Good questions..
  1) As for what will be there in the other universes if at all there are more universes, nobody can tell, as of now..
  2) Not necessarily.. As, even in the lecture, he says that if at all the multiverse concept is proved some day, then we can detect the collision of universes based on the temperature current difference the collision sets up, much like we detect the collision of stars or galaxies in our own universe currently. So, the universe can still continue to expand despite the existence of other universes.
  3) Our laws are still 'universally' applicable, just not 'multiversally' applicable, if I may say so..
  And yes, there might be life forms which completely defy our laws or our understanding of the way things work. But then, we would need a different definition of 'life' to accommodate all those too.
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  durga ch

  i could not watch the vedio, but by going with discussion, may be its time the \definiton\ of universe is redefined. What exaclty differentiates a 'universe' from other universe?? to what extend the phrase \universe\can be applied??