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When Atoms Hear the Universe Ripple

Detecting gravitational waves has always demanded enormous machines; kilometre scale instruments capable of sensing distortions smaller than a proton. But a new theoretical study suggests the universe may have been leaving its calling card in the light emitted by individual atoms. If the idea holds up, the future of gravitational wave detection might not be sprawling observatories carved into the landscape, but something you could hold in the palm of your hand.

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