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An account of Volcanologist Haroun Tazieff's long "love story" with the formidable Nigarongo, a volcano situated in what was formerly Belgian Congo, from 1948 when Tazieff was the first man ever to climb it and to explore it until the mid sixties.

Richard Hammond goes to the centre of the planet to find out how the Earth works. Using computer technology, Richard peels back the layers and shows where volcanoes come from, why earthquakes happen and even where to find diamonds.

From Iceland to Central America to Italy, experts take an in-depth look at four imposing volcanoes, each bigger, potentially deadlier, and more explosive than the last.

Volcanoes, some still active, shape East Africa's vast savannas, mainly consisting of grasslands where huge wildebeest and other herds roam and their annual migration steers the habitat type's complex life cycle. Some areas still remain primeval jungle, or became marshes or even hostile salt zones, yet all harbor intensive wildlife,whose lives are a merciless struggle for life, for elephants as well as insectivores.