Photo of Genome-Edited Calf (image) University of California - Davis Share Print E-Mail Caption Cosmo, a 110-pound bull calf was born in April of 2020 at UC Davis. Scientists successfully genome-edited him as an embryo to produce more male offspring. Credit Alison Van Eenennaam/UC Davis Usage Restrictions Please credit Share Print E-Mail 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.