Is Supersymmetry still viable in cosmology, given that so far no supersymmetric particles have been found. From Wiki. SUSY is often criticized in that its greatest strength and weakness is that it is not falsifiable, because its breaking mechanism and the minimum mass above which it is restored are unknown. This minimum mass can be pushed upwards to arbitrarily large values, without disproving the symmetry, and a non-falsifiable theory is generally considered unscientific. However, many theoretical physicists continue to focus on supersymmetry because of its usefulness as a tool in quantum field theory, its interesting mathematical properties, and the possibility that extremely high energy physics (as in around the time of the big bang) are described by supersymmetric theories.