Original: Another advantage of supersymmetry is that supersymmetric quantum field theory can sometimes be solved . Supersymmetry is also a feature of most versions of string theory , though it can exist in nature even if string theory is incorrect .
Simplified: Supersymmetry is a of theory ( commonly found in some forms of string theory ) that says that when the universe was made , there was also the same number of theoretical '' superparticles '' created .