<human>:  What are the effects of black-hole radiation on space-time?
<bot>: The effects of black-hole radiation on space-time are far-reaching. Physicists believe that when a black hole emits radiation, it causes a form of space-time curvature that acts on the surrounding matter. This curvature then has a ripple effect on the structure of the universe, creating distinct gravitational effects that can be seen and measured. Additionally, physicists believe that this radiation emanating from black holes is responsible for the acceleration of the universe's expansion, as well as a decrease in the overall mass of the black hole itself over time.