NASA's robotic sub readies for dive into Earth's deepest sinkhole

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Credit: DEPTHXCarnegie Mellon University
Credit: DEPTHX/Carnegie Mellon University

An underwater robot, shaped like a flattened orange, maneuvered untethered and autonomously within a 115-meter-deep sinkhole during tests this month in Mexico, a prelude to its mission to probe the mysterious nether reaches of the world's deepest sinkhole.


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