Expeditions to the Edge

Scientists become separated as tragedy strikes a jungle research expedition.

A team of scientists head to the mouth of the Galeras Volcano to try and predict the next eruption.

A sandstorm turns a desert marathon into a race for survival.

In the Pamir-Alai Mountains an American couple rock climbs the Yellow Wall. Gunfire eruptsfrom Muslim militants, seeking revenge and ransom.

Nine climbers are swept into a crevasse during an expedition to the summit of Mount Hood.

A risky attempt to rescue imperiled climbers on Mount Everest.

A group of 11 geologists are trapped when an unforeseen rainstorm floods a cave.

Four men on an experimental minisub get tangled in the wreck of a warship.

A family fights to survive when killer whales attack its schooner.

Divers face tragic consequences when they plunge into the icy waters of New Zealand's cave system.

Men and women competing in the Iditarod find themselves fighting to survive.

Neil Armstrong and David Scott try to complete the world's first orbital docking mission.