I read once that string theory explains gravitation via invoking quanta of the electromagnetic field to transmit the force of gravity over large distances. Is this the truth? I read somewhere else that string theory invokes gravitons and extra dimensions to explain the force of gravity. Since my understanding of string theory isn't excellent, and since it could be an informative exercise, I was wondering if anyone would mind explaining to me exactly how string theory yields gravity in either the Newtonian or relativistic senses.
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