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Old 23-January-2008, 12:34 PM
Louigi Verona Louigi Verona is offline
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Default Fecund Universes

What do you think about Fecund Universes theory? (wiki link)

How much facts are actually behind it?
(submitted it to the astronomy and not q&a because want it to be a discussion rather than a question answering)

I personally think that it's probably the first idea that finds a "useful purpose" to black holes, at least useful from our own perspective.


edit: this I found to be extremely interesting:
Modern scientific theory, however, does provide a mechanism by which universes can be formed. The original theory of general relativity predicted that when a black hole was formed it collapsed into a singularity. That is, space and time would become so curved here that everything would collapse into a point. General relativity also predicted that our universe sprang from a singularity during the big bang. But we now know that general relativity breaks down below the Planck length. It is here that quantum mechanics begins to play a part. For this reason, physicists have suspected for a long time that a singularity would violate the uncertainty principle, and hence cannot exist. Recently, this conjecture has been investigated mathematically. This is still speculative, but according to one theory of quantum gravity a singularity is not formed. Instead, space and time do not collapse to a point but rather into a (four-dimensional) tube which opens into an entirely new region of space and time. The singularity "bounces" back out into a big bang. This means it is entirely possible that our own universe was produced when a black hole was formed in another universe.
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Old 23-January-2008, 12:54 PM
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This would be off the mainstream, at best.
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Old 23-January-2008, 01:22 PM
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I don't know how much of a mainstream there is in regard to blackholes.
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Old 23-January-2008, 05:16 PM
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Quote:
Originally Posted by Louigi Verona View Post
What do you think about Fecund Universes theory? (wiki link)
I've read Lee Smolin's book where he summarized the idea (The Life of the Cosmos) Interesting, imaginative, but.....

Quote:
Originally Posted by Louigi Verona View Post
How much facts are actually behind it?
Yes, this is a major problem. No signal or information can ever emanate from a black hole, so nobody really knows what's going on inside one. So anybody can speculate about anything happening there, and who's going to prove them wrong? Most of the scientific community respect Lee Smolin, as do I, and his idea about "cosmic natural selection" is thought-provoking. Mainly, it offers a non-anthropic explanation as to why the physical constants, etc. seem to be so finely tuned for our existence. But the lack of evidence for any scientific idea leaves it unsatisfying.
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Old 24-January-2008, 03:15 PM
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Quote:
The theory surmises that a collapsing black hole causes the emergence of a new universe on the "other side"
Of...?
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Old 25-January-2008, 05:38 PM
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Didn't Andrei Linde explore that in the early 70's

The real problem is that it will remain forever impossible to prove. Anything that cannot be proven remains therefore dubious, at best.
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Old 26-January-2008, 05:33 AM
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Its an incredibly interesting idea, but seems like it should be reserved for science fiction. Even if this or anything remotely resembling it were true, its impossible to observe.

Like I said though, extremely cool idea for a book or movie.
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