To make the weight, Mr Ellicock packed a sleeping bag, climbing rope, biology textbook, ankle weights and "random bits of clothing".

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The pair also has an adequate amount of heft without being overbearing when added to the weight of an already packed rucksack.

ENGADGET

Twenty one people, who were all normal weight, were shown pictures of calorie packed foods while they were positioned in a magnetic resonance imaging (MRI) machine at Imperial College London.

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For shipping, alleviating glass bottles significantly reduces the weight and the shape allows the wine to be packed more efficiently which results in a reduced amount of fuel needed to ship the wines.

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Food could potentially use up a lot of valuable weight too, so the sailors live exclusively on a diet of freeze-fried, vacuum-packed dinners.

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