The conversation between human and AI assistant.
Ever seen supernatural beings, that are not from this world? If so what did they look like, and where did you see them?
Wow, that's amazing. Can you tell me more about black holes?
Certainly! A black hole is a region of spacetime where gravity is so strong that nothing, not even light, can escape from it. The boundary around a black hole from which no escape is possible is called the event horizon. It's an incredibly fascinating and mysterious phenomenon in the universe.