Scientists Find Record 2.7-Million-Year-Old Ice Core in Antarctica

Back in 2010, a group of scientists drilling in Antarctica pulled up a one-million-year-old chunk of ice. At the time, it was the oldest ice core ever discovered. But as Paul Voosen reports for Science, the team recently dug even deeper into Earth’s glacial history, unearthing an ice core that dates back 2.7 million years.