<div><article><div><div><div><p><span><span>Published <time dateTime="2026-04-12T13:49:02.000Z">23 hours ago</time></span><span> • </span><span>loading...</span><span> • </span><span>Updated <time dateTime="2026-04-13T00:40:26.000Z">12 hours ago</time></span></span></p></div><p></p><h2>The new GWTC-4 catalog adds 128 candidates and includes unusually heavy, fast-spinning and lopsided black hole mergers, scientists said.</h2><p></p><div><p><span>Gravitational-wave data from the LIGO-Virgo-KAGRA Collaboration reveals merging black holes fall into three subpopulations with different cosmic origins.</span></p></div></div><div><p><span>Think freely.</span><span>Subscribe and get full access to Ground News</span><span>Subscriptions start at $9.99/year</span><a id="think-freely-subscribe" href="/subscribe">Subscribe</a></p></div><section><div><div><p></p><section><span><span>skycr.org</span> broke the news in <span> <time dateTime="2026-04-12T04:24:51.000Z">1 day ago</time> on Sunday, April 12, 2026.</span></span></section><p></p></div><svg width="15" height="16" viewBox="0 0 15 16" fill="none" xmlns="http://www.w3.org/2000/svg"><title>Too Big Arrow Icon</title><path d="M5.67937 1.97111C5.67937 2.46344 6.03103 2.8151 6.52336 2.8151L10.8137 2.8151L0.263747 13.365C-0.0879158 13.7167 -0.0879158 14.2793 0.263747 14.5607L0.685744 14.9827C0.967076 15.3343 1.52974 15.3343 1.8814 14.9827L12.4313 4.43275L12.4313 8.72304C12.4313 9.21537 12.783 9.56704 13.2753 9.56704H13.838C14.26 9.56704 14.6819 9.21537 14.6819 8.72304L14.6819 1.40845C14.6819 0.986449 14.26 0.564453 13.838 0.564453L6.52336 0.564453C6.03103 0.564453 5.67937 0.986449 5.67937 1.40845V1.97111Z" fill="currentColor" /></svg></div><span>Sources are mostly out of  (0)</span></section></div></article></div>

Study Finds Three Distinct Types of Black Hole Mergers

The new GWTC-4 catalog adds 128 candidates and includes unusually heavy, fast-spinning and lopsided black hole mergers, scientists said.

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