Grooves on the surface Phobos hint Mars' gravity is tearing it apart
Grooves on the surface of Mars’ largest moon suggest it is being destroyed by its parent planet. While scientists have long suggested it is doomed to be destroyed, the ‘extensive system of grooves’ the first signs that the rocky satellite is gradually been torn apart. They were first spotted in the 1970s, but new analysis shows the grooves match up with regions being put under stress.
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