english: When food was scarce, our ancestors' survival depended on conserving energy, and regaining the weight when food was available would have protected them against the next shortage.
non_english: Keď bolo jedla málo, prežitie našich predkov záviselo od šetrenia energiou a opätovné priberanie, keď bolo jedlo dostupné by ich ochránilo pred ďalším deficitom.