Black Hole Theory explains the formation and properties of black holes, which are regions in space where gravity is so strong that nothing, not even light, can escape. They typically form when massive stars exhaust their nuclear fuel and collapse under their own gravity. The boundary surrounding a black hole is called the event horizon, beyond which no information can escape. Scientists study black holes to understand their effects on surrounding matter and light. The general theory of relativity, proposed by Albert Einstein, predicts their existence and describes how they warp space-time. Observations of gravitational waves and the Event Horizon Telescope have provided evidence supporting this theory.