Overview
- The two vertebral growth plates were collected by archaeologist Otto Geist in interior Alaska in 1951 and were catalogued as woolly mammoth remains at the University of Alaska Museum of the North for more than 70 years.
- A targeted reanalysis tied to the Adopt‑a‑Mammoth project produced radiocarbon ages of roughly 1,900–3,000 years before present, far too young for mainland woolly mammoths.
- Stable isotope tests found unusually high nitrogen‑15 and carbon‑13 values in the bones, which pointed to a marine food web rather than a grass‑eating terrestrial diet.
- Researchers recovered mitochondrial DNA that matched a North Pacific right whale for one specimen and a common minke whale for the other, securing the reclassification.
- The cause of the inland burial remains unresolved—scientists considered river or ice transport, human movement, past coastline change and museum mix‑ups—and the finding highlights the value of systematic rechecks of legacy collections for refining extinction timelines.