Submission + - New Large Caves Found on Mars
David DelMonte writes: "space.com is reporting the discovery of seven dark spots near the Equator on Mars. They are thinking that these are cave openings. The openings are the size of football fields, and one of them is thought to extend approximately 400 feet below the surface. The full story is here. http://www.space.com/scienceastronomy/070402_mm_ma rs_caves.html
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