"The Cosmic Hunger: Is the Universe at Risk of Being Consumed by a Black Hole?"

Black holes cannot devour the entire universe or even an entire galaxy. They only swallow objects that venture into their event horizon, which is extremely close to the black hole. While a black hole's gravity can impact surrounding stars and planets, it does not swallow them. The size and self-regulation of black holes, as well as the accelerating expansion of the universe, prevent them from devouring entire galaxies. So, there is no need to worry about giant, universe-swallowing black holes, unless the universe is already inside a black hole.