KNOXVILLE, Tenn. — An East Tennessee woman is back home after competing in a marathon at the North Pole. She ran 26.2 miles on frozen ice of the Arctic Ocean, all while enduring extreme temperatures.

The rapid movement of Earth’s magnetic north pole has puzzled scientists in recent years, as it has shifted from its usual position in the Canadian Arctic toward Siberia. This phenomenon, which has ...

“The history of the many attempts to reach the North Pole,” Norwegian author and adventurer Erling Kagge writes, “is also the history of how illusions of a frozen wasteland can lure people to their ...