RNA Worlds (IMAGE) Cold Spring Harbor Laboratory Caption The ancient RNA world is represented by RNA self-replication at the center of the spiral with the diversity of modern RNA represented at the near end of the spiral. Some RNA structures are shown in layers at the sides. Credit Cold Spring Harbor Laboratory Press Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.