Astronomy
Impact Cratering and Regolith Evolution on Airless Bodies
Quick fact
A single cratering event can launch debris thousands of kilometers across an airless body, and over billions of years, repeated impacts have churned the Moon's surface completely—essentially 'gardening' the regolith to a depth of several meters.
Why this is interesting
Every time you look up at the Moon, you're seeing a surface that has been thoroughly blasted by countless impacts, but how does that constant bombardment actually build the dusty ground beneath it?