Mysterious 'gigantic' hole in remote region spotted by helicopters over gas-rich Yamal peninsula.
Supplies to EU maintained despite mega-blast with flames 200 metres in the sky, and heat felt 1km from fireball.
Unique crouched burials for this period - comprising seriously ill quartet - presents archeologists with a puzzle.
Satellites show giant hole ringed by 20 'baby craters'.
Academics restart work to unlock secrets of mystery medieval civilization with links to Persia on edge of the Siberian Arctic.
Macabre remains of six slaughtered polar bears, 'beheaded with their skins removed', now under criminal investigation.
A deal would be the biggest Chinese equity participation in onshore oil in Russia.
But notorious 'chessboard murderer' was 'ditched by his prospective bride' though he refuses to believe he was dumped.