Antarctica: Tip Off

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If there's one thing they forget to tell you about Antarctica, it's the fact that you won't be getting much sleep there. Time becomes a very elastic concept in summer on the continentyou can expect as much as 20 hours of sunshine a day, and regular markers such as mealtimes will vary according to the weather (for example, if the weather's good around lunchtime, the food will be delayed while you go ashore or do a spot of kayaking).

This means that insomnia (or what Antarctic veterans call "big eye") affects many people during the...