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Dark energy chameleon force experiment rules out some dark energy possibilities


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Dark energy ‘chameleon trap’ wins £100,000 prize for Nottingham scientist



The setup involved dropping ultra-cold atoms into a bowling-ball sized vacuum chamber containing a lump of aluminium. If a chameleon force existed, it should have a higher value in the empty space and be “hidden” close to the heavy lump of metal.

Unfortunately, no mysterious forces were uncovered, but the experiment was able to squeeze down the possible values that a chameleon force could take into a small window



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