From Photosensitive Molecules to the Evolution of Living Been

All our knowledge leads us to believe that the origin of life was the formation of photosensitive molecules, which then contributed to the birth of primitive living organisms, such as cyanobacteria and cyanophyceae. Once these archaic organisms were able to feed and reproduce, other organisms would have acquired the ability to enter into symbiosis with them, taking mutual advantage of continuity and metabolic efficiency. In this article we try to trace the possible paths of this intriguing story, presenting hypotheses that are plausible, or that are a stimulus for further investigation.