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"Precious moon samples brought back to Earth by China's Chang'e 5 mission in 2020 have finally been shared with international researchers — but the law has made it difficult for U.S.-based scientists to receive any of the material."https://www.space.com/astronomy/moon/china-is-sharing-priceless-moon-samples-with-international-partners-but-nasa-cant-be-a-part-of-it