Deadly volcano that's one of the most dangerous on Earth... but scientists can't predict when it will erupt as it's in the middle of a war zone

Mount Nyiragongo is one of the most dangerous volcanoes in the world - and scientists say it is only a matter of time before it makes the city below a modern day Pompeii.

But they don't know when since, located as it is in the war-torn eastern edge of the Democratic Republic of Congo, the two mile high cauldron of lava is also one of the least well understood.

At the base of Nyiragongo sprawls Goma, a city of an estimated one million people, numbers swelling by the day as villagers from the countryside seek refuge from rebel and government forces.

Twice in recent years Nyiragongo's eruptions have hit the city, destroying homes and sending residents fleeing. But now, seismologists believe, the risk is not just near the city, but directly beneath it. Read More