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The hosts visit Asia to study a destructive volcano in the premiere of this series featuring the study of geological events.

Investigating a giant asteroid that may have been responsible for killing off the dinosaurs. Also: a NASA super gun; an underground river in Mexico.

Examining whether Iceland's volcanoes could cause global problems in the future.

Catastrophic geological events in Hawaii's history are examined.

Biologist Liz Bonnin and Geologist Martin Pepper investigate the world’s most dangerous volcano Mount Vesuvius only to discover that the three million people of Naples live in the shadow of another, much more deadly super volcano, called Campi Flegrei.

Uranium used for the atomic bomb is sought in the Rocky Mountains.

Evidence of the Ice Age is sought in North America.

A look at volcanoes, earthquakes and tsunamis in Japan.