Multimedia Gallery
January 11, 2005
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Not all sea ice cracks are as obvious as this one at Granite Harbor.
Dangerous beauty: Not all sea ice cracks are as obvious as this one at Granite Harbor. Those buried under small ridges of snow can mask ice that's too thin to support heavy tracked vehicles. Antarctic researchers use ice drills to gauge the safety of proceeding.
Credit: Peter Brueggeman
Images credited to the National Science Foundation, a federal agency, are in the public domain. The images were created by employees of the United States Government as part of their official duties or prepared by contractors as "works for hire" for NSF. You may freely use NSF-credited images and, at your discretion, credit NSF with a "Courtesy: National Science Foundation" notation.
Additional information about general usage can be found in Conditions.
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Related story: Antarctic Treasure: The Underwater Images of Norbert Wu