A view from the inside: The east wall of the U.S Polar Rock Repository features a map of Antarctica.

The U.S. Polar Rock Repository at Ohio State's Byrd Polar Research Center has space for up to 180,000 rock specimens.

View from the outside of the U.S. Polar Rock Repository at Ohio State's Byrd Polar Research Center.

David Elliot, a professor of geological sciences, and Anne Grunow, curator of the U.S. Polar Rock Repository, use a petrographic microscope to look at different minerals

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