The radar of Yutu-2 distinguishes three layers of material beneath the South Pole-Aitken crater: 130 m of regolith and craters ejecta over ~100 m of mare basalt, all overlaying >200 m of ejecta from the Leibniz crater. Zhang et al.: https://t.co/szy2WIpC5O pic.twitter.com/LnFvxayWe8

— Nature Astronomy (@NatureAstronomy) September 7, 2020