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Former NASA astronaut Kathy Sullivan becomes the first woman to reach the lowest point on Earth.
It’s not silent at the bottom of ocean. For three weeks, researchers from Oregon State University dropped a titanium-encased hydrophone at the bottom of the Mariana Trench in the Pacific, at a depth of 36,000, deeper than Mount Everest is tall.
The DeepFlight Challenger submarine will journey to the deepest known part of the ocean, the Challenger Deep at the southern end of the Marianas Trench.
