Drilling shortcut penetrates Earth's mantle. (National Science Foundation's Ocean Drilling Program)

Science News | February 20, 1993| | Copyright

While physicians might dream of curing cancer, geoscientists have longed to drill through the Moho - the boundary between the planer's thin crust and its interior mantle. By taking a shortcut, researchers have come close to realizing that goal.

An international group of oceanographers returned late last month from an expedition near the Galapagos Islands, where they bypassed the crust and drilled directly into the upper mantle. The rocks they collected will help scientists attempting to understand the formation of the ocean floor --which forms twothirds of the ...

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