Unless an eventual origin of life is proposed (on another planet or in space), then for each step, the observer must ''regress'' one age into the past. The problem is that he never stops regressing. ''An infinite regression cannot have an identifiable first cause.'' | Unless an eventual origin of life is proposed (on another planet or in space), then for each step, the observer must ''regress'' one age into the past. The problem is that he never stops regressing. ''An infinite regression cannot have an identifiable first cause.'' |