How the Earth Works

Liz and Martin head to Indonesia to explore the dangerous volcano Krakatoa.

Martin and Liz investigate a giant asteroid impact.

Martin and Liz visit Iceland to investigate the threat from its volcanoes.

Liz and Martin head to Hawaii to investigate catastrophes in its past.

A trip to Naples uncovers a massive supervolcano called Campi Flegrei.

Liz and Martin explore North America in search of evidence of Ice Ages.

A trip to Japan to gauge the threat of volcanoes, earthquakes and tsunamis.