Bouncing Boulders May Finally Explain How Mars' Ugliest Moon Got It Stripes

A new computer simulation suggests Phobos’ stripes were made by rolling and bouncing boulders dislodged by a cataclysmic asteroid strike.

from gizmodo http://www.gizmodo.co.uk/2018/11/bouncing-boulders-may-finally-explain-how-mars-ugliest-moon-got-it-stripes/