China's top 10 scientific breakthroughs in 2021

Chang'e-5 lunar mission returned to Earth on Dec 17, 2020, retrieving a total of 1,731 grams of lunar samples, mainly rocks and soil from the moon’s surface.

Chinese researchers studied the lunar samples and dated the youngest rock on the Moon at around 2 billion years old, extending the "life" of lunar volcanism 800-900 million years longer than previously known.

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