Marching Gentoo Penguins (IMAGE) GigaScience Caption Gentoo Penguins in Antarctica form a line as they march down a 'penguin highway' to collect rocks for their nests. Credit Photo by Laurie Goodman 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.