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In this January 21, 2015 photo, scuba diver Luis Torres tests the water near the Chilean scientific station Escudero in Villa Las Estrellas on King George Island, part of the South Shetland Islands archipelago in Antarctica. For a dozen days in January, in the middle of the chilly Antarctic summer, The Associated Press followed scientists from different fields searching for alien-like creatures, hints of pollution trapped in pristine ancient ice, leftovers from the Big Bang, biological quirks that potentially could lead to better medical treatments, and perhaps most of all, signs of unstoppable melting. (Photo by Natacha Pisarenko/AP Photo)
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