William Ryan, of Columbia University's Lamont-Doherty Earth Observatory outside New York, says there are fewer nodules than people generally believe and most of them are in very deep water.

威廉·莱恩(供职哥伦比亚大学莱蒙特-道荷提地球观测所，位于纽约城外)说，锰结核比人们通常认为的要少，而且大部分位于深水。

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Edward Cook works with the Lamont-Doherty Earth Observatory at Columbia University in New York.

VOA: special.2010.05.25

Roger Anderson, a geophysicist and director of the Energy Research Center at Columbia University's Lamont-Doherty Earth Observatory, says that the discoveries may have only begun.

FORBES: Going deep

"The problem with satellites is, we can't see through the ice sheet with satellites, " said Robin Bell, a scientist at Columbia University's Lamont-Doherty Earth Observatory who also is involved in the project.

CNN: NASA flights will study Antarctic ice changes

University's Lamont-Doherty Earth Observatory in Palisades, N.

ENGADGET: NASA finds new evidence of ice in Mercury's polar craters