A photon defies the laws of physics after a 2-billion-light-year journey

A photon survived a journey of over 2 billion light-years, contradicting current physical models.

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The fact

Researchers Giorgio Galanti and Marco Roncadelli publish their findings in *Physical Review Letters*.

This discovery could challenge fundamental principles of physics.

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Auto-synthesis from 1 media source · identified on September 8, 2026