Warp wrote:
> stbenge <stb### [at] hotmailcom> wrote:
>> Some of the new theories point an explanation regarding this. According 
>> to the theories, only certain particles can pass between dimensions, or 
>> branes.
> 
>   Theories are usually devised to try to explain otherwise unexplained
> observed phenomena, or in some cases, some consequence of an existing
> theory if it is true (eg. the black hole theory is a consequence of GR).
> 
>   Exactly which phenomena are these theories trying to explain?
>

Most of these attempts are aimed at unification of quantum and 
relativity. Another thing that annoys physicists a great deal and that 
does seem to justify any means is: WTH has the fine structure constant 
that silly value of nearly 1/137? This might also have played a role, I 
don't know for sure.

>   A theory which doesn't even try to explain some observed phenomenon
> is pure speculation and useless.
> 
No, it is pure mathematics. And an interesting branch at that. Who knows 
someday it will move from pure to applied mathematics. It leaves open 
the question why so many physicist nowadays do pure mathematics.

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