Rather than speculate on the ideas that might have developed in the absence of string theory, we can celebrate the remarkable insights that have emerged from it. It has explained, for example, why black holes have entropy and temperature. It has also demonstrated a surprising fact: theories of strong nuclear forces are equivalent to theories of gravity. Over the last two months, several new papers use string theory to describe the motion of quarks in the plasma created by the Relativistic Heavy Ion Collider at Brookhaven! Not bad for a theory whose critics say is pie in the sky.
— Barton Zwiebach: a letter to the editor
2010.08.25 Wednesday ACHK