Crystal Gammon for Live Science writes this article, linked above through Yahoo news, about the suprising bridges deep down in the Marianna Trench, which is located in the Pacific Ocean.
Under the sea there are mountains (seamounts) that don't reach the surface, and now scientists know that there are also bridges, maybe 6000 feet high, that are also elevated but narrow. The scientists are mapping these. It's still a mystery how they are formed but they have a theory...
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