Best View Ever of Hidden Seafloor Revealed in New Images [Slide Show]
Scientists use satellites to produce astoundingly detailed pictures of unmapped terrain

10-3-2014 | Josh Fischman

Eighty percent of the ocean floor, hidden deep below the waves, has not been mapped. It is out of the accurate range of surface sonar. But now a series of new maps have been produced, twice as precise as anything done before, and they reveal thousands of previously uncharted sea mountains as well as fractures at the ocean bottom that produce deep-sea earthquakes.

Slide Show.