Meteorites have punched at least 222 impact craters into the Moon’s surface in the past 7 years. That’s 33% more than researchers expected, and suggests that future lunar astronauts may need to hunker down against incoming space rocks.
“It’s just something that’s happening all the time,” says Emerson Speyerer, an engineer at Arizona State University in Tempe and author of a 12 October paper in Nature1.
Planetary geologists will also need to rethink their understanding of the age of the lunar surface, which depends on counting craters and estimating how long the terrain has been pummelled by impacts. … (Nature)