Scientists affiliated with the Integrated Ocean Drilling Program(IODP)and seeking the elusive "Moho"-the boundary which geologists refer to as the Mohorovicic discontinuity between Earth's outer crust and its mantle-have created the third deepest hole ever drilled into the ocean bottom's crust.Scientists had hoped to drill into the Earth's mantle,but found instead that their efforts had missed the mark,they now believe by less than 1,000 feet.
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