Ancient black hole collision is the most massive researchers have ever observed - The Verge

Ancient black hole collision is the most massive researchers have ever observed - The Verge
  1. Ancient black hole collision is the most massive researchers have ever observed  The Verge
  2. Gravitational waves: Monster black hole merger detected  BBC News
  3. Physicists Spot Four Black Hole Collisions, Including the Largest One Ever Recorded  Gizmodo
  4. Scientists detect biggest known black-hole collision  Phys.org
  5. *FOUR* new black hole mergers have been found blasting out gravitational waves!  SYFY WIRE
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