Celegans Young to Old Mothers Embryos (IMAGE) Center for Genomic Regulation Caption <i>Caenorhabditis elegans</i> embryos containing fluorescent yolk from younger (left) to older mothers (right). Credit Marcos Francisco Perez, CRG. Usage Restrictions CC-BY 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.