You know, they sure aren't kidding in this documentary-DVD when they call a volcano - "Nature's Inferno" - 'Cause, believe me, that is exactly what it is!Through plenty of eye-popping footage of volcano activity, as well as interviews with experienced volcanologists, the viewer quickly learns everything there is to know about these ferocious geysers of belching smoke, clouds of ash and rivers of molten lava.From Italy, to Japan, to Indonesia and beyond - National Geographic presents this expertly-photographed documentary-DVD of an amazing, uncontrollable phenomenon that's bound to spark the interest of most viewers.*Note* - Experts tell us that, today, there are an estimated 1,500 potentially dangerous volcanoes, worldwide..... Wow!.... And, hey, you just never know when one of them is gonna blow!