Rolling stones could be responsible for Phobos' grooves after all

Scientists have long debated the cause of the distinctive grooves on the surface of Mars' moon Phobos. One leading theory has it that the lines are signs of structural failure as the tiny body is pulled apart by the forces of gravity acting on it and its parent planet. But a competing idea suggests the marks may be superficial, caused simply by rolling stones on Phobos' surface. Now, new research addresses the long-standing objections to that theory.

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Category: Space

Tags:

• Brown University
• Mars
• Phobos
• Simulations

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