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Phys.org

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Luminescence dating pushes age of South Dakota

Deep within an ancient sinkhole lie the remains of dozens of mammoths, prehistoric wanderers who waded into the warm springs to their deaths. These deaths had long been accepted as having occurred roughly 26,000 years ago, but new dates published in the journal Quaternary Research suggest these ice-age giants were more than 160,000 years old.

13 Sep 2026 10:10 pm