I suspect our bodies have so little fat or superfluous muscle they can turn into fuel that we're almost totally reliant on what we eat to keep us going now.
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In short, I'm afraid to say -- though it's probably quite apt -- that I concur with Captain Scott himself when he said of the South Pole, "Great God this is an awful place".
Getting to the top, and seeing what lay on the other side, is a moment I'll remember and treasure for the rest of my life.
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