A new global map of small mare ridges suggests the Moon’s tectonic activity is younger and more widespread than previously believed. Researchers identified more than 1,100 previously unknown ridges, showing the lunar crust is still shrinking. These features, formed by thrust faults similar to lobate scarps, indicate moonquakes could occur across much broader regions. The findings may reshape how space agencies assess seismic risks for future lunar missions, including Artemis.