The Bell That Rang Across a Billion Years
Ten years after the first gravitational wave detection, LIGO has caught nearly the same event again — two black holes merging 1.14 billion light-years away — but three times clearer. The signal, GW250114, confirmed Hawking's area theorem at 99.999% confidence and, for the first time, resolved two distinct ringdown tones from a newborn black hole vibrating like a struck bell.
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