[Graewoulf]

What comments do you know about that relate to the grooves on this moon? Is this a melting response?

[petuniasevan]

The grooves on Phobos are still a mystery. They may be related to the giant impact crater Stickney, as they are abundant there but are almost absent on the opposite side.

The European mission "Mars Express" is intended to images close-up the leading edge of Phobos when the craft arrives at Mars later this year.

Mars Global Surveyor image, 8-19-98.
Resolution is 12 meters.

Another theory is that the grooves are actually strings of craters formed from impact of materials thrown off Mars from meteoric impacts THERE. See the photo below and you may agree: