Researchers have found an undisturbed 16,000-year-old sand dune on the campus of Michigan State University.
It's far from the water, and researchers say it was left behind when the ice sheets were melting away as the climate warmed.
The university said Monday the find is underneath a grove of pine trees between Demonstration Hall and Munn Ice Arena.
Michigan State geography professor Alan Arbogast says it's the first time he's seen an inland sand dune so far south.
The dune was found by the Campus Archaeology Program. It's run by the Department of Anthropology.
Participating students seek to identify historic and prehistoric sites on the 5,200-acre campus.
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