Aging

My semi-pro perception of aging on a histriological level was always that cell DNA got old and somewhat 'wrinkled' from numerous reproductions and mid-life mutations or deviations. And like an old rechargeable battery losing its max power over numerous dis and recharges, human life force would fade. Combined with DNA increasing on a statistical level of deviation from original fitness, the old person would either experience a fatal system error via DNA or in a larger organ system resulting from DNA error, or they would become so old and decharged the remaining charge would decide to move on, or be attracted away from the body itself.