Light from a distant γ-ray burst backs up a key prediction of Albert Einstein's theory of relativity — that photon speed is the same regardless of energy. But it might set the stage for evolution of the theory.
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Amelino-Camelia, G. Burst of support for relativity. Nature 462, 291–292 (2009). https://doi.org/10.1038/462291a
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DOI: https://doi.org/10.1038/462291a
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