Crossing the icy unknown, hunting climate clues

(AP) -- On the 27th day of their trek, a dozen "black specks" of humanity crawling across Antarctica's vast white silence, Lou Albershardt heard a sound she'd never heard in two decades on the ice.

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<p><a href="http://www.physorg.com/news156870658.html">Crossing the icy unknown, hunting climate clues</a></p> <p>(AP) -- On the 27th day of their trek, a dozen "black specks" of humanity crawling across Antarctica's vast white silence, Lou Albershardt heard a sound she'd never heard in two decades on the ice.</p>