Mars could gain a ring in 10-20 million years when its moon Phobos is torn to shreds by Mars gravity. Image by Tushar Mittal using Celestia 2001-2010, Celestia Development Team.Though inevitable, the demise of Phobos is not imminent. It will probably happen in 20 to 40 million years, leaving a ring that will persist for anywhere from one million to 100 million years, according to two young earth scientists at the University of California, Berkeley.
http://www.youtube.com/watch?v=uml3Gi06-pg
Mittal said its not clear whether the dust and debris rings would be visible from earth, since dust does not reflect much sunlight, whereas ice in the rings of the outer planets makes them easily visible. But Mars ring may reflect enough light to make Mars slightly brighter as seen from Earth, he said, and through a telescope the shadows of the rings might also be visible on the surface.
Standing on the surface of Mars a few tens of millions of years from now, it would be pretty spectacular to watch, Black said.
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