They dived into rivers and lakes to celebrate the Orthodox Christian holiday of Epiphany.
Flourishing trade in souvenirs and household goods.
Elephants and tigers entertain public in cities along staggering 16,000km (9,950 mile) route.
Putin hails 'pragmatism and common sense' as he launches US-Russian oil project in Kara Sea, which has Saudi-scale potential.
The discovery of an ice-preserved female mammoth comes amid a debate on whether scientists should try to recreate the species using DNA.
Summer flooding will worsen dramatically, and the Arctic could be ice-free in summer by 2034.
Brave Timur moved into the Siberian tiger's cage, and took over his bed.
Altai floodwater could be sent to parched Xinjiang Uygur Autonomous Region of China, says Russian agriculture minister.