Astronomers may have just confirmed one of the quirkiest aspects of quantum mechanics: that seemingly empty space can alter the behavior of light. This phenomenon, called "vacuum birefringence," was first predicted nearly 90 years ago by Werner Heisenberg, one of the founding fathers of quantum ...

Source: [Phys.org](https://phys.org/news/2026-08-rare-ultra-magnetic-star-key.html)

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