Cave formations may offer a new chance to track climate history back thousands of years. Discovery News' James Williams climbs below the surface to learn more.
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Earth: Caves Offer Climate Clues
Cave formations may offer a new chance to track climate history back thousands of years. Discovery News' James Williams climbs below the surface to learn more.
Added: Feb 23, 2010
Views: 7465 Views
Runtime: 05:13
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