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The LK-99 ‘superconductor’ went viral — here’s what the experts think

A screen shot of a fragment of dark gray rocky material partially floating over a round magnet. One side of the fragment is raised in the air while the other is touching the magnet.
A screenshot of a video showing LK-99 partially levitating. A group of researchers who developed the material say it’s evidence that LK-99 is the world’s first room temperature superconductor. Experts are skeptical. | Image: A screenshot taken of a video uploaded to ScienceCast by Hyun-Tak Kim

If LK-99 is the real deal, it could be a game-changer for everything from quantum computing and medical imaging to energy and transportation. But there are a lot of red flags.

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