Emergency services refuse to comment cause of extraordinary blast in the dark sky.

Experts still divided over mysterious 1,300-year-old fortress-like structure located on island in middle of lake.

Reindeer herders find more craters in the far north in a deepening puzzle for scientists. 

Mysterious 'gigantic' hole in remote region spotted by helicopters over gas-rich Yamal peninsula.

These are the first pictures and video of scene in Khabarovsk region where a sudden and massive rock movement causes semi-blockage and flood risk.

Satellites show giant hole ringed by 20 'baby craters'.

Startling new footage shows how a ‘mountain moved’, trees were ‘beheaded’, and blocks of river ice ‘flew’ onto the land.

The magnificent male Siberian cat called Mir, a gift from Russian president Vladimir Putin, has completed quarantine at Narita international airport.

After archeologists dug up the ancient mummy - preserved in permafrost - natural disasters were unleashed in Siberia, court told.