Scientists at China’s Experimental Advanced Superconducting Tokamak (EAST) program rang in the new year with a stunning accomplishment: empirical evidence that they used the device to achieve nuclear plasma densities once thought to be beyond human capabilities.

On January 1, researchers at the Hefei Institutes of Physical Science at the Chinese Academy of Sciences published a wild new study in the journal Science Advances. In it, the team details the way they used EAST — which has memorably been dubbed China’s “artificial sun” — to achieve a plasma density far higher than previous limits.

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