The weird linear grooves scoring the surface of the Mars moon Phobos were carved by boulders knocked loose by a giant impact, a new study suggests.
https://www.space.com/42504-mars-moon-phobos-grooves-boulders.html
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From @zathras
The weird linear grooves scoring the surface of the Mars moon Phobos were carved by boulders knocked loose by a giant impact, a new study suggests.
https://www.space.com/42504-mars-moon-phobos-grooves-boulders.html