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Einstein Predicted How Gravity Should Work at the Largest Scales. And He Was Right

Researchers working with the Dark Energy Spectroscopic Instrument have mapped nearly 6 million galaxies across 11 billion years of the Universe's history. In a new study, they explain that gravity at the largest scales behaves exactly as Einstein predicted it would with the general theory of relativity. These observations also limit the possible theories of modified gravity, which have been proposed to explain dark matter observations.

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