Interstellar: black holes, wormholes and “the warped side of the universe”—curved spacetime, holes in the fabric of reality, how gravity bends light. black holes. For example, their gravity is so strong that they bend the fabric of the universe. Einstein explained this: The more massive something is, the more gravity it produces. Objects like stars and black holes do this so powerfully that they actually bend light and pull space and time with it.