Recently, during an archeological study in Denali National Park, a technician discovered the tusk of a woolly mammoth—the only one ever found in the park.

The tech was walking along a gravel bar when she made the discovery, according to a Park Service Facebook post. At first she thought it was a downed tree, but it looked a little bit different. The team excavated the nearly 4-foot-long tusk so it wouldn’t wash away.

A mammoth molar and several bones that look to be from the extinct Steppe Bison were also found. The team will test all the artifacts for age and evidence of human modification.

Before this discovery, the only other woolly mammoth remains found in Denali was a tooth that a visitor found in the 1960s.

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