Well , it appears to me that string theory is a interesting attempt to "quantize" the space-time manifold (added with suitable supersymmetric structures ).Everything in higher dimensions become reduced to two-dimensional quantum field path integral models "living"on the string chart manifold (the intrinsic two-dimensional "string space-time").However , people impose dipheomorffism invariance on this intrinsic string parameter "space-time" which unfortunatelly get mixed with 2D conformal invariance , when one uses the sigma model Polyakov' action to assign "energy" for these "quantum -fluctuating extrinsic /observable higher dimension space-time process (quite different from the more geometrical Nambu-Goto string action ).In order to solve this problem one thus impose full sigma model conformal invariance by restricting that all strings Schwinger sources (the string higher dimensional field back grounds-including the own extrinsic space time manifold dimension!)to lead to a vanishing beta function for the sigma model Polyakov action at any perturbative order of the new universal coupling constant-the String length scale/Regge parameter.This produces an apparently well defined (?,and about the infrared 2D cut-off remotion on the perturbative Feynman calculationson the intrinsic string space-time ?) 2D Field theory for the extrinsic space-time quantum energy action, besides of fixing the string Schwinger sources to satisfy the usual Einstein-Maxwell-etc field equations at one loop and the extrinsic space-time dimension and the classical manifold topology of the extrinsic space-time to be fixed, when one has supersymmetry (Spin manifold space time structures,etc..).At this point , one has an apparently well defined quantum -mechanical framework to evaluate numerically scattering amplitudes (including quantum gravity!-the old dream ) to compare with the experimental results.That is the problem on this new quantum-mechanical framework : as far as I know nothing has been matched with the usual qed,qcd,etc results!(anomalous particle magnetic momentum, deduction of the asymptotic freedom in QCD ,The Higgs mechanism on the weak sector ,etc.

please, help these poor videos escape the queue

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http://www.videosift.com/video/Dawn-Penn-You-Don-t-Love-Me
http://www.videosift.com/video/Dj-Mujava-Township-Funk
http://www.videosift.com/video/Brandon-Hardesty-Re-Enactment-Network
http://www.videosift.com/video/John-Wheeler-Pioneer-of-Nuclear-Fission-Quantum-gravity
http://www.videosift.com/video/Fucking-robots-yeah-someone-made-some
http://www.videosift.com/video/The-Rubber-Boy

No one will ever see a singularity, that's part and parcel of the whole black hole thing. Most physicists think they don't actually exist and just use the term as a marker for the breakdown of the current standard model. There can't ACTUALLY be infinite curvature of space-time: the idea is mathematically absurd. But that's what our best theory leads to... thus, our best theory is wrong and we know it. When physicists (or perhaps this guy, who knows?) come up with a theory of quantum gravity that fits all observation and has predictive power, everyone expects the singularity issue will be resolved. Einsteinian relativity will still work, just as Newtonian gravity still works today, it's just not the whole picture.

A black hole does not need to have a singularity in order to have such powerful gravity that light can't escape. The mass needn't be infinitely dense, just packed smaller than the event horizon. But since nothing can escape the event horizon, not even light, we'll never directly observe what's going on in there. Accept it!