Black Sky

The Russian president's trip on Wednesday coincided with a marked improvement in levels of pollution, they claim.

Krasnoyarsk's skies have been black since the start of the New Year, with locals complaining of 'chemical smell', lack of oxygen.

Dramatic dark cloud swathes the city of Omsk as a bright sunny day turns night-like.

Residents of sub-Arctic Verkhoyansk district of Yakutia woke up in complete darkness.

Flash seen over thousands of kilometres but scientists disagree over the cause.

Russian scientists deny theory of respected Italian team by 'proving' that the remote blue lake is older than the famous 1908.

'Scary' scenes as fumes from burning forests cover Lake Baikal, with people - and bears - fleeing 'Apocalypse'.

Local reindeer herder witnessed the tundra explosion that led to birth of new hole in river.