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Ancient Antarctic Ice Reveals 12°C Climate Shift

10/29/2025

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Summary

Story summary

U.S. scientists found 6-million-year-old ice and air in the Allan Hills, East Antarctica.
The ice, preserved by the East Antarctic ice sheet, shows a cooling of 12 degrees Celsius.
The study is led by Sarah Shackleton and John Higgins of the Center for Oldest Ice Exploration (COLDEX), planning drilling from 2026 to 2031 to obtain more climate snapshots for publication in the Proceedings of the National Academy of Sciences (PNAS).

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Story summary

U.S. scientists found 6-million-year-old ice and air in the Allan Hills, East Antarctica.
The ice, preserved by the East Antarctic ice sheet, shows a cooling of 12 degrees Celsius.
The study is led by Sarah Shackleton and John Higgins of the Center for Oldest Ice Exploration (COLDEX), planning drilling from 2026 to 2031 to obtain more climate snapshots for publication in the Proceedings of the National Academy of Sciences (PNAS).