Volcanoes were erupting on the mysterious far side of the moon billions of years ago, US and Chinese researchers have found.
Analysis of samples collected by a Chinese mission found basalt (volcanic rock formed after an eruption) fragments dating back more than 4.2 billion years.
The findings were published in the Nature and Science journals on Friday.
While scientists already knew of volcanic activity on the near side of the moon, which we can see from Earth, the "dark side" is very different in its geology, and remains largely unexplored. ...