Everything under heaven serves some purposes.

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To everything there is a season, and a time to every purpose under the heaven, says the book of Ecclesiastes.

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Early in the book, Kavenna describes her meeting with a kindred spirit, the philosopher and mountaineer Arne Naess, who mourns the loss of the personal relationship to nature once offered by living in the far north under the heaven of stars.

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Yet even the roughest morning-after can be cured in under an hour according to Dr Jason Burke, the founder of Hangover Heaven, a 45ft-long bus that treats the side effects of drinking too much with IV therapy.

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