Worms (IMAGE) University of Wisconsin-Madison Caption UW-Madison Arboretum ecologist Brad Herrick displays several jumping worms that surfaced to escape irritating mustard poured on the soil. The worms have invaded southern Wisconsin and are thought to damage soil ecosystems. Credit Eric Hamilton / UW-Madison 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.