Moon rocks brought to Earth by Chinese mission fill key gaps in solar system history

China’s new moon-rock treasure trove may be a billion years younger than the material the Apollo program brought home decades ago, according to new research.

All told, in December, China’s Chang’e 5 spacecraft managed to return 3.81 pounds (1.73 kilograms) of moon rock from a region called Oceanus Procellarum to scientists on Earth. Since then, scientists with access to the precious material have begun a bevy of experiments to understand the rocks and the secrets of the solar system that they might hold. 



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