Penguins diving (IMAGE) University of Nebraska-Lincoln Caption A gentoo penguin takes a plunge at Omaha's Henry Doorly Zoo and Aquarium. New research from the University of Nebraska-Lincoln has demonstrated how the blood of penguins evolved to help them better hold their breath while hunting for seafood. Credit Craig Chandler, University of Nebraska-Lincoln 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.