Landslides on the Moon? Get a Klute.

On the Moon's far side — the hemisphere forever hidden to prying eyes on Earth — lies a crater named Klute (after an engineer who was part of the team that developed the Saturn V rocket engines). Klute is old, terribly old; it's 75 kilometers wide and extremely degraded, eroded by billions of years of subsequent impacts around it, as well as the gradual effect of the solar wind and micrometeorite impacts.

To its immediate northwest is a much fresher crater about 28 km wide, called Klute W. We c...