Deep below the earth, we spend three days with the men and women working at the frontline to keep Russia, and the world, fuelled.
Found 30 metres underground at a coal mine, they're dubbed 'Jurassic pearls' or the marbles of a Siberian colossus.
The quake could be a world record for a tremor caused with involvement by humans, it is claimed.
New discovery of rare crystal Rosenbergite at 'burning ice' site where earth is hot despite temperatures of minus 35C.
Once the coal mining capital of Central Kolyma, it was ghosted after the 1996 mine explosion.
Crater 'swallowed ex-cop', but no-one can find him a week later.
Veteran governor Aman Tuleev claims the accusations are 'absurd' and he is real target over conflict with Moscow.
The 5.3 tremor was felt over a wide area but was centred some 21km from Belovo in Kemerovo region.
Scheme would allow epic journeys from London to the Japanese capital with major international crossing between Sakhalin and Hokkaido.