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Because of a record-shattering ice core recovery from Antarctica, Prof. John Higgins and other researchers from Princeton University and the University of Maine in Orono are listed as a runner-up to "Science Magazine's Breakthrough of the Year.” The research team's 2.7-million-year-old ice core is significant because of embedded tiny bubbles of greenhouse gases that could provided clues to what triggered Earth's ice ages, and is 1.7 million years older than any previous ice sample recovered.