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flag Black holes' merger confirmed Einstein’s relativity and Hawking’s area theorem through gravitational waves.

flag The KAGRA, LIGO, and Virgo collaborations have confirmed key black hole theories by analyzing gravitational waves from GW250114, a merger of two black holes each about 32 times the Sun’s mass. flag The detection, three times louder than the first, provided the most precise test yet of Stephen Hawking’s area theorem and Roy Kerr’s 1963 solution, showing the final black hole’s surface area increased and its "ringdown" produced two distinct frequencies matching predictions. flag This supports Einstein’s general relativity and advances understanding of black hole physics, with future observations expected to improve with next-generation detectors like the Laser Interferometer Space Antenna.

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