Guillemot Eggshells (1 of 3) (IMAGE) Society for Experimental Biology Caption The guillemot eggshells have hierarchical cone nano-structures that enable them to survive precarious habitats, on exposed cliffs with no nest. Credit Steven Portugal and Golo Maurer 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.