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Air trapped in Antarctic ice has been out of circulation for 1.5 million years

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LOS ANGELES — Tiny bubbles of air buried deep in the ice of Eastern Antarctica may contain bits of the Earth’s atmosphere as it was 1.5 million years ago, according to a new report.

“Ice is a great medium for trapping air,” said Ed Brook of Oregon State University, one of several authors of a paper in the journal Climate of the Past that describes where this ancient ice might be. “It traps it without altering it very much.”

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