The U.S. and Russia are in a showdown for control of the Arctic Circle, and, as global tensions rise, ABC News gets a look inside a state-of-the-art U.S. Navy submarine: the USS Pasadena.

Sir Ernest Shackleton’s ship “Endurance” was found in Antarctica.

Famous ship Endurance, which sank during a 1915 Antarctic expedition, was discovered more than a century later.

Images out of a northern region of Antarctica show a landscape nearly devoid of ice and snow following record-setting temperatures last week.

A Portland, Oregon man has become the first person to traverse Antarctica alone, unassisted in any way by wind or with additional supplies