Supersymmetry is a theory which stipulates that for every known particle there should be a partner particle. For instance, the electron should be paired with a supersymmetric 'selectron,' quarks ought to have 'squark' partners, and so on.
Brian GreeneAll you are is a bag of particles acting out the laws of physics. That to me is pretty clear.
Brian GreeneHow can a speck of a universe be physically identical to the great expanse we view in the heavens above?
Brian Greene