Rockfall map suggests moon’s surface still changes

Researchers have analyzed an archive of more than two million images of the lunar surface and have created the first global map of rockfalls on the moon.

Even billions-year-old landscapes are still changing, the research finds.

On the moon, time and again boulders and blocks of rock travel downslope, leaving behind impressive tracks, a phenomenon that has been observed since the first unpiloted flights to the moon in the 1960s.

During the Apollo missions, astronauts examined a few such tracks on site and returned displaced rock block samples to Earth. However, until a few years ago, it remained difficult to

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