Bacterial Colonies (IMAGE) Frontiers Caption Induced radio-resistant E. coli, evolve complex mutation profiles as experimental evolution continues and the level of radio-resistance increases Credit Michael M. Cox and coauthors 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.