Snail evolution in the making (IMAGE) Institute of Science and Technology Austria Caption Crab-ecotype snails (1992) evolved to strikingly resemble the lost Wave-ecotype snails on a skerry. Credit ISTA, images by Kerstin Johannesson Usage Restrictions - License Original 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.