Hyenas once roamed the Arctic. Their teeth tell the tale.

The New York Times reported on the research of Jack Tseng, whose team identified the first hyena fossils ever found in the Arctic — two teeth in Yukon Territory in Canada. The fossils were identified following Tseng's examination of fossils discovered in the 1970s, then archived in a museum's research facilities. The story highlights how museum collections may be filled with forgotten fossils that could expand knowledge of prehistory.