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black hole is a region of spacetime where gravity is so strong that nothing, including light or other electromagnetic waves, has enough energy to escape it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole

Highest mountain. ... Oldest person ever. ... Largest spider. ... Land speed (fastest car) ... Largest human mattress dominoes. ... Longest time in an abdominal plank position (male) ... Longest fingernails on a pair of hands ever (female) ... Shortest dog living. View this record Shortest dog living.