Three Zebras Drinking (IMAGE) University of Bristol Caption The mystery of why zebras have their characteristic stripes has perplexed researchers for over a century. Credit Amelia Gillard, University of Bristol Usage Restrictions Single use only - with press release 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.