As a general rule I want to preserve this blog for talk about physics but several of the well read physics blogs are talking about the banking crisis and the collapse of Lehman Brothers so I will make one comment here. I am not going to say anything about whether governments should be bailing out banks. I am looking at the longer term issue of why this kind of thing happens. So the rating agencies have a controlling hand in Wall Street, y.

The Official String Theory Web Site. So what is string theory? For that matter, what the heck are elementary particles? If this all sounds totally confusing, try this section first. What progress are physicists making towards experimental tests of string theory predictions? What kinds of math do string theorists use and why? And how has string theory changed mathematics? Was there a String Bang before the Big Bang, or did the Universe simply unwind? .

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