Example of Contagious Yawning in Wolves (image) PLOS Caption a. An individual (on the right) yawned during a resting period. b. A few seconds later, the subject (on the left) yawned contagiously. Credit Teresa Romero Usage Restrictions CC-BY 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.