image: This research ship, NATHANIEL B. PALMER, is an ice-breaking ship used for scientific research by the U.S. Antarctic Program. view more
Credit: Photograph by: Al Hickey<BR> National Science Foundation
U.S. National Science Foundation
image: This research ship, NATHANIEL B. PALMER, is an ice-breaking ship used for scientific research by the U.S. Antarctic Program. view more
Credit: Photograph by: Al Hickey<BR> National Science Foundation
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