A University of Alaska Fairbanks paleontology team searching for Alaska's last mammoths made a startling discovery: two whale bones radiocarbon-dated to just 2,000 years ago, found 400 kilometers inland from the ocean. The bones, originally cataloged as mammoth vertebrae from Dome Creek near Fairbanks, turned out to belong to a North Pacific right whale and a minke whale.

Paleontologist Matthew Wooller and colleagues had been analyzing over 300 mammoth fossils through their Adopt-a-Mammoth crowdfunding project, which costs $380 per specimen and includes test results and naming rights. The radiocarbon dates initially suggested mammoths survived in Alaska until 1,900-2,800 years ago, but DNA testing revealed the misidentification. Stable isotope analysis of nitrogen and carbon ratios also didn't match mammoth signatures.

The discovery raises questions about how whale bones ended up so far inland in central Alaska. While the mammoth extinction timeline remains at around 11,000 years ago based on dated fossils, ancient DNA evidence suggests some mammoths may have survived until 5,700 years ago in permafrost regions. The whale mystery adds an unexpected chapter to Alaska's paleontological record, demonstrating how even experienced researchers can be fooled by fossilized remains that appear similar across species.