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Scanning the Bottom of the World

Grant Ballard of the Point Reyes Bird Observatory scans the open water off Cape Crozier during a 2007 expedition to Antarctica to study Adélie penguins and effects of climate change on the region. The research team also included WHOI geologists who were trying to piece together a much older puzzle: How long has the massive East Antarctic Ice Sheet been frozen in place?(Photo by Chris Linder, Woods Hole Oceanographic Institution)