collected conch shells.jpg (IMAGE) Smithsonian Tropical Research Institute Caption Muestras modernas de caracoles recolectados para extracción de ADN Credit Alexis Sullivan Usage Restrictions Please credit Alexis Sullivan 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.