Thermometer showing -55 degrees
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Extreme World: Hot and Cold

1 December 2010 Last updated at 17:33 GMT

In Siberia, the winter temperature can drop to -60C, making it one of the coldest places to live in the world.

The BBC's Adam Mynott visited the district of Oymyakon district to see how people cope with everyday life under such extraordinary conditions and why they continue to live there.