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Interesting holes in an iceberg in Antarctica. The National Science Foundation runs the U.S. Antarctic Program (USAP). In addition to maintaining three U.S. research stations on the continent, USAP supports research projects in an array of scientific disciplines including, for example, aeronomy and astrophysics, biology and medicine, geology and geophysics, glaciology, and ocean and climate systems.
Image credit: Peter Rejcek, National Science Foundation / Source: U.S. Antarctic Program photo library
