Warp wrote:
>   That's the kind of "observation" I don't understand.

They're still working on that one.  Someone recently proposed it's actually 
gravity waves causing the "collapse", which is why it doesn't happen until 
you get enough particles that gravity becomes significant. Or some such.

That's another one of those "nobody is sure why yet" kind of things.

-- 
Darren New, San Diego CA, USA (PST)
   Human nature dictates that toothpaste tubes spend
   much longer being almost empty than almost full.

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