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NASA-funded robotic sub makes final dive to reach bottom of Earth's deepest sinkhole

Scientists from the University of Texas at Austin's Jackson School of Geosciences and other institutions begin the final leg of a five-year, NASA-funded mission to reach the bottom of Cenote Zacatón in Mexico, the world's deepest known sinkhole, hoping to learn about Zacatón's geology, geothermal vents and forms of life. Previous expeditions tested the robotic probe that makes the dive, DEPTHX, designed to explore for life in extreme regions on Earth and in outer space.

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