Daphnia Pulex (IMAGE) Rensselaer Polytechnic Institute Caption Zooplankton rapidly evolve tolerance to moderate levels of road salt. Credit Rensselaer Polytechnic Institute 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.