Life’s Emergence: Gradual or Sudden?
A fundamental question in origin-of-life studies is whether life emerged gradually, passing through numerous intermediate stages, or appeared rapidly once the right conditions were present. Some evidence suggests a slow, stepwise process involving increasing molecular complexity, while other data indicate that life arose quickly after Earth became habitable. The debate continues, with new discoveries constantly reshaping our understanding of how—and how fast—life’s first sparks were ignited.