2,300-year-old Chinese chemistry formula deciphered after analyzing ancient coins

Knife coins used in ancient China that were analyzed in the study. (The Trustees of the British Museum/CC BY-NC-SA 4.0) Knife coins used in ancient China that were analyzed in the study. (The Trustees of the British Museum/CC BY-NC-SA 4.0)

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South Korea says North Korea test-fired missile toward sea

North Korea on Sunday fired a short-range ballistic missile toward its eastern seas, extending a provocative streak in weapons testing as a U.S. aircraft carrier visits South Korea for joint military exercises in response to the North's growing nuclear threat.

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