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John Higgins led a team of researchers who reported in 2015 the recovery of a 1-million-year-old ice core from the remote Allan Hills of Antarctica, the oldest ice ever recorded by scientists.
A team of researchers has found that greenhouse gasses a million years ago were only slightly higher than they were between 450,000 and 800,000 years ago.
The Princeton Environmental Institute (PEI) has announced $1.1 million in new awards to support climate and energy research at Princeton University.