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  1. The Economist10 min

    Black holes: why they matter

    Alok Jha

    Black holes, defined by their event horizons and singularities, span from stellar remnants weighing three to twenty solar masses to supermassive giants millions of times heavier that anchor galaxies. Detection milestones since 1971, culminating in the Event Horizon Telescope's images of Cygnus X-1 and Sagittarius A*, have confirmed their existence through gravitational lensing and X-ray emissions. These cosmic phenomena remain central to resolving the conflict between General Relativity and Quantum Theory, particularly regarding the black hole information paradox and the nature of singularities.