How can light exist as both a particle and a wave?
There are some interesting paradoxes produced by the two-slit experiment, with regard to the dynamics of particle physics. Greene theorizes that particles are comprised of strings that vibrate in multidimensional space, far smaller than those we can notice, even with our most advanced supercolliders. It is that vibrational pattern which determines the nature of the particle, which in turn, dictates the way we it behaves in the portions of spacetime that we can detect.