(IMAGE) Institut Pasteur Caption A two-month-old cerebral organoid viewed under the microscope, measuring approximately two millimetres across. Credit Credit: Institut Pasteur-SupBiotech Usage Restrictions Please mention full copyright as well as the "Cerebral Ageing experiment" when using this picture. License Original 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.