  Special solutions of string theory in supercritical dimensions can
interpolate in time between theories with different numbers of spacetime
dimensions (via dimension quenching) and different amounts of worldsheet
supersymmetry (via c-duality). These solutions connect supercritical string
theories to the more familiar string duality web in ten dimensions, and provide
a precise link between supersymmetric and purely bosonic string theories.
Dimension quenching and c-duality appear to be natural concepts in string
theory, giving rise to large networks of interconnected theories. We describe
some of these networks in detail and discuss general consistency constraints on
the types of transitions that arise in this framework.
