String Theory

String theory is a in particle physics which attempts to reconcile quantum mechanics and general relativity. String theory posits that the electrons and quarks within an atom are not 0-dimensional objects, but rather 1-dimensional oscillating lines ("strings"), possessing only the dimension of length, but not height or width. The theory poses that these strings can vibrate, thus giving the observed particles their flavor, charge, mass and spin. The earliest string model, the bosonic string, incorporated only bosons, although this view evolved to the superstring theory, which posits that a connection (a "supersymmetry") exists between bosons and fermions, two fundamentally different types of particles. String theories also require the existence of several extra, unobservable, dimensions to the universe, in addition to the usual three spatial dimensions (height, width, and length) and the fourth dimension of time. M theory, for example, requires that spacetime have eleven dimensions.^[2]