Grand canyons formed on moon in minutes after colossal asteroid strike

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 oneTwo 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 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  New Scientist – Home