<i>Science Signaling</i> Cover Image (IMAGE) University of California - Berkeley Caption In the study, chick embryos were stained blue and red to identify craniofacial features. High temperatures caused severe craniofacial defects in chicks, dramatically shortening the upper beak compared to normal controls. This photo was featured on the cover of Science Signaling. Credit Liu, et al. 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.