This February 2, 2015 photo shows the Ocean Nova cruise in Maxwell Bay, near King George Island, Antarctica. Antarctica is roughly the size of United States and Mexico combined, but tourists and the 4,000 or so scientists who live here part of the year mostly keep to areas that aren't permanently frozen and where wildlife can be found. Those areas account for less than 2 percent of the continent. (Photo by Natacha Pisarenko/AP Photo)
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