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Expanding catalog of black hole collisions is rewriting the history of the universe

New gravitational wave detections reveal unusual black hole mergers and refine measurements of the universe’s expansion rate. Between May 2023 and January 2024, a global network of gravitational-wave detectors picked up 128 new cosmic signals, more than doubling the entire catalog built across the previous decade. The universe, it turns out, is not quiet. It is constantly s... [8523 chars]

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