Cell Development Mystery (IMAGE) Kyoto University Caption Kyoto University scientists are casting light into the black box of human "germ cell" development. It is hoped that their new model may lead to findings in all stages of human development, from the creation of sperm and eggs to the process of embryo-to-adult development. Credit Kyoto University 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.