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British explorer embarks on Antarctica adventure

British explorer Sir Ranulph Fiennes, 68, has embarked on an expedition that he describes as one of the last remaining polar challenges: crossing Antarctica during the region's winter.

 

The trip is particularly hazardous because no aircraft can travel inland in the winter due to the darkness and risk that fuel will freeze, meaning there is virtually no chance of a search and rescue operation if things go wrong. (AP)