We became obsessed by the search for food, but what drove us was nothing like ordinary appetite. When the brain senses the onset of starvation - that is, when it realises that the body has begun to break down its own flesh and tissue to use as fuel - it sets off an adrenaline surge of alarm just as jarring and powerful as the impulse that compels a hunted animal to flee from an attacking predator. Primal instincts had asserted themselves, and it was really fear more than hunger that compelled us to search so frantically for food. Again and again we scoured the fuselage in search of crumbs and
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