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Story summary
- A six-million-year-old ice core from Allan Hills, East Antarctica, shows long-term Pliocene cooling, with temperatures dropping about 22°F (12°C).
- The team is led by Sarah Shackleton and John Higgins.
- These ice cores include the oldest directly dated samples.
- They plan to drill more cores between 2026 and 2031.
- Separately, two French explorers seek 130,000-year-old ice to study its implications for global sea levels amid rising temperatures.
