New research shows that when an asteroid slammed into the moon billions of years ago, it carved out a pair of grand canyons on the far side.

Two canyons that splay out from a vast asteroid crater on the moon may have been quickly formed by chains of impacts that followed the initial one

Researches have determined that ejecta from an ancient asteroid. strike carved out the grand canyons (Vallis Schrödinger and Vallis Planck) in less than 10 minutes.