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Black holes have such strong gravity that no matter, not even light, can escape them. Also, black holes are known to have a lifespan that is virtually infinite because they constantly absorb matter existing in the universe. However, Dr. Stephen Hawking, who was studying black holes, explained this when he came up with the Hawking radiation theory. The conventional idea that no matter can escape a black hole is wrong. As a black hole loses its mass, it emits energy equal to its mass. This is Hawking radiation. Also, according to the Hawking radiation formula, the lifespan of a black hole is not infinite. When Dr. Stephen Hawking first came up with the Hawking radiation theory, scientists were shocked. What on earth is Hawking radiation that made scientists so confused? This voice was produced by the artificial intelligence voice actor service Typecast. Artificial intelligence voice actor - Xavier https://typecast.ai References and book information Stephen Hawking's black hole - Stephen Hawking's black hole war - Leonard Susskind Black holes and time travel - Kip Thorne Professor Woo Jong-hak's black hole lecture - Woo Jong-hak