WSU: Fundamental Lessons from String Theory with Cumrun Vafa 

It is wrong if it dominates the field of theoretical physics to such an extent that it suffocates it and leaves little or no room for other lines of research. Also, to do real science you need experiments to verify your theory and it has been proven time and again that string theory does not work. It is time to move on and make room for new ideas.

@@xanetas so it has both not been tested and also it does not work. but how would you know it doesn't work if it hasn't been tested? what you wrote was incoherent nonsense

The 'problem' is that we have two experimentally well-proven theories that contradict each other. The reason string theory is so attractive is because it may be able to unify Einstein's Theory of General Relativity - which accurately describes gravity, and Quantum Mechanics - the Standard Model which accurately describes 3 of the 4 known forces EXCEPT GRAVITY. The Standard Model forces are the strong nuclear force, the electromagnetic force, and the weak nuclear force. Also, we now know that above a certain energy the electromagnetic force and the weak nuclear force merge into the electro-weak force. The reason eleven dimensions is part of string theory is because if you choose that mathematical input into the string theory equations as currently understood, you get a prediction for a particle that has the predicted characteristics of a Graviton (spin 2, etc.) - the predicted force-carrying particle of gravity, and that would therefore UNITE Special Relativity and Quantum Mechanics. Disclaimer: I'm NOT a physicist, I DON'T have a degree, just a curious and well-read layperson, and I welcome corrections.

Lew Sheen We now understand gravity to be the warping of space due to mass. Why do we need gravitons?

May i suggest that "older people" could get access to knowledge an integrative incompassing wise view of the "world" without any technics, though we ignore and deny it. There are a lot of things within LIFE that we do not understand. Now we have smart phones AND no longer smart bodies: pandemic of metabolic disease, loss of awareness, loss of sensitivity, we get slowly less smart that wild animals... We think of mars exploration, of extraterrestrial life but kill everyday the marvels of life on earth and make the planet very soon inhabitable. I have a word for that: crazyness and "lack of integration" lack of a sense that we are only a part of a whole.

It cannot be Experimented . Many resources have been wasted on it .

But it seems like things keep unifying, albeit in a not perfectly symmetrical way for electromagnetism and the weak nuclear force. Scientists get positive feedback for exploring it.

In physics it doesnt matter much what country you come from. You just need to deliver the _goods_ . Professor V always did. ;-)

I’m Greek too and an engineer. Some of ancient Greek science was correct. Most was wrong.

@@karagi101 Well, I am talking about the philosophic point of view. They had felt the motion of the world, they had found the general laws of this motion and also the relativity of the world because of this motion. Also, Socrates gave us the process of gnoseology Even today science is avoiding accepting the dialectic and the motion of our world. They looking moments of the world on "pictures" and with this way they trying to explain a moving and continuously changing world. So, except of the technology progress, we are in a worst position in the way we think.

Χαραλαμπος Στρογγυλος No. Today’s science explains reality much better. The ancients didn’t have science. They didn’t do almost any experiments. They thought they can figure things out just by thinking about things. Thinking about things doesn’t provide any evidence and our thoughts are usually wrong.

@@karagi101 Our thoughts are the result of a reflection of the reality on our conscience. If the conscience isn't corrupted and wants the truth then you realize nature better and clearly. Do you think that the math of the ancient world isn't science? the π? The Pythagorean theorem? the euclidian geometry? algebra? the architecture? the art? the music? where they had rules and law that had from 6-12 between the notes music sounds and now our simplicity is such bulgar like rap? Now is anybody in the possibility to build Parthenon or Palmira where for transferring the rocks now you couldn't build such a machine? Pyramids all over the world? Sphinx? Do you know that they had used stim? Or the sun with mirrors as a laser weapon? Do you have any idea about medicine? Did you hear about Asklipeus hospitals? Or the books of medicine of Hepocrat? I hope that your comment was only unfortunate and not ignorants. A lot of knowledge is destroyed or is kept as secrets by the church's Taliban which has burned the Alexandrian library 3 times the last one they kill and the math, engineer, and philosopher Hypatia. They close the Athenian Academy they killed Bruno and so many others and today, ha ha ha, today they mess everywhere only to use and pay scientists to keep humanity under total ignorance. Because between blinds rules better the monocular. Do you remember who is the father of the BB hypothesis? E priest. Do you know who gave the ironic name BB? Yes, but today this stupidity is the main Cosmologic, not a hypothesis, but without experimental prove it's the main theory. Or, do we have any experimental prove about string theory I mean hypothesis? 47 years this continues. Do you know how many fonds of humanity have been throw away on these hypotheses? At list ancient Greeks they earned their money. They left us such remarkable things. So, if you are a Greek or you want to be a Greek then think before speak, as a Greek, dialectical. Like: Causality, necessity, indefinitely, fortunately, and result and so on and do not forget everything is relativistic as before Einstein, Heraclitus told us. And Heraclitus from what we know didn't do the wrong of Einstein wherein the SR theory correctly looks on space and time like relativistic dimensions of material things, which depends on the velocity of the material object and the referring system and to do the wrong in the GR theory to see on time and space as a geometrical sheet that a terrestrial mass bends. Probably SR was a theory of his first wife, and for that reason, he gives her the hall amount of the Nobel price.

True, strings may not be fundamental.

Any one can comment .. nothing is bigger than that