Ice Surface (IMAGE)

Princeton University

Ice Surface

Caption

Gas bubbles trapped in the cores contain pristine samples of carbon dioxide, methane and other gases that serve as 'snapshots' of the ancient climate. Because ice flows and compresses over time, the cores the researchers retrieved are like scenes collected from a very long movie that do not show the whole film, but convey the overall plot.

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(Photos by Sean Mackay, Boston University)

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