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A black hole is a region in space with such strong gravity that nothing can escape, including light. It originates from Einstein's theory of general relativity, which describes how massive objects warp space and time. Inside a black hole, there is a singularity of infinite density surrounded by an event horizon beyond which nothing can return. Black holes come in different sizes, with their mass determining their strength and influence. Scientists cannot observe them directly due to their light-trapping nature, but they can infer their presence through gravitational effects on surrounding matter and light. Research has provided insights into fundamental laws of physics and the nature of space and time. A black hole was recently imaged, providing visual evidence of its event horizon. This discovery continues to fascinate scientists and the public, highlighting the mysterious nature of these cosmic objects.