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  • RESEARCH HIGHLIGHT

Found: the world’s oldest known mint and its jumbo product

Spade coins excavated from Guangzhuang mint

Fragmented ‘spade coins’ found at an ancient mint are the earliest known metal currency in China and possibly the world. Credit: Hao Zhao

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Nature 596, 320 (2021)

doi: https://doi.org/10.1038/d41586-021-02181-7

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