Completing any marathon is a major accomplishment, but completing the race on one of the world's toughest courses is another beast. Take a look at some of the m ...

The trillion-ton slab of ice that scientists call a "megaburg" broke off from the Antarctic’s Filchner Ice Shelf in 1986.

The biggest iceberg on Earth is heading toward a remote island, creating a potential threat to penguins and seals inhabiting ...

If it gets stuck near South Georgia Island, that could make it hard for penguin parents to feed their babies and some young ...

The world's biggest iceberg—more than twice the size of London—could drift towards a remote island where a scientist warns it ...

Inhabitants on a remote British Island are at risk due to the world's largest iceberg heading their way. The massive trillion ...

The world’s biggest iceberg — a 130-foot (40-meter) tall wall of ice the size of Rhode Island — that had shaken loose of its mooring is lumbering toward a remote island off Antarctica that’s home to ...

Beneath Antarctica's ice, an unsuspected danger looms. Global warming could awaken dormant volcanoes, triggering a chain reaction with unpredictable consequences. This recent discovery sheds light on ...