How is space represented with quantum gravity ?
The demand for consistency between a quantum description of matter and a geometric description of spacetime , as well as the appearance of singularities ( where curvature length scales become microscopic ) , indicate the need for a full theory of quantum gravity : for an adequate description of the interior of black holes , and of the very early universe , a theory is required in which gravity and the associated geometry of spacetime are described in the language of quantum physics .