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The largest Roman army ever assembled stands poise...

The world's mightiest river is a place of mystery ...

National Geographic Explorer-in-Residence Dr. Mike...

The full length program about a climbing disaster ...

The story of the mysterious Indonesian island of S...

Scientists uncover startling genetic evidence abou...

Think you know the outcome when it's shark versus ...

December 20, 2007—A new species of spitting ...

New York is a city of islands, but busy waterways ...

Every second counts in the hunt for the man who as...