Philip Ball explains why the foundations of physics are not quaking at suggestions that the ultimate speed limit ñ the speed of light ñ might have been broken. .
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References
Wang,L. J., Kuzmich, A. & Dogariu, A. Gain-assisted superluminal light propagation. Nature 406, 277 - 279 2000.
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Ball, P. Going over c. Nature (2000). https://doi.org/10.1038/news000720-9
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DOI: https://doi.org/10.1038/news000720-9