This undated handout photo provided by the journal Science shows ice penetrating radar over the freeze-on ice along the southern margin of the Gamburtsev Mountains. The intense blue sky reflects the high altitude and thin atmosphere of the polar plateau. When it comes to ice, scientists are giving a whole new meaning to the phrase "bottoms up." Those massive ice sheets in Antarctica don't just grow from the bottom up, according to new research published Thursday. (AP Photo/Robin E. Bell--Lamont Doherty Earth Observatory, New York)
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