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Two intrepid explorers take us to Earth's most powerful volcanoes through a mix of history, science, ancient beliefs, and riveting footage.

Volcano Hunters

The clipper Royal Charter sunk in a storm. Loss of life was immense, but so was its hoard of gold; $130 million worth. Can it be retrieved?

Follow two young adventurers as they travel halfway around the world to embark on a 1,500-mile rafting expedition down India's mystic Ganges River.

Avalanches can be a massively destructive force. Scientists search for ways to control this awesome power of nature.

Dr. Ben Longmeir is trying to use the fourth state of matter, plasma, to revolutionize space travel to Mars, the Moon, and other targets.

Climbers make three attempts to summit the 6,060-meter (20,000-ft) Yangmolong Mountain. They must now decide whether to give up, or to continue.

Ultra marathoner Nikki Kimball takes on the 273-mile Long Trail. What drives someone to attempt such a feat, and what allows them to finish?

Observe how humans and sharks come together to look, interact, and touch. What can we learn from encounters with the largest predators on the planet?