A Peek under the Beak (IMAGE) Yale University Caption This is an artist's rendition of the nonavian dinosaur Anchiornis and a modern tinamou with premaxillary and palatine bones highlighted. Credit John Conway 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.