From: Brian Atkins (brian@posthuman.com)
Date: Fri Jul 28 2006 - 23:22:13 MDT
I'm not an expert by a longshot, but it does appear that there are still some 
potentially valid hypotheses other than black holes for explaining what happens 
in highly concentrated areas of large mass. Besides the MECO idea, there are 
also gravastars and dark energy stars aka quantum critical shells. Oh, and we 
may be living inside a spinning one:
http://groups.yahoo.com/group/transhumantech/message/33956
http://groups.yahoo.com/group/transhumantech/message/10873
Also in other news there may possibly be a pair of supermassive black holes in 
the middle of our galaxy instead of just one, and this could explain 
hypervelocity stars recently discovered shooting out of our galaxy, which 
conveniently may be able to help test various dark matter halo ideas:
http://www-astro.mps.ohio-state.edu/~ognedin/hvs_newscientist.txt
And we may be able to create dark matter using lasers:
http://groups.yahoo.com/group/transhumantech/message/35961
-- Brian Atkins Singularity Institute for Artificial Intelligence http://www.intelligence.org/
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