Molecules caught tunneling (IMAGE) University of Innsbruck Caption Quantum mechanics allows particles due to their quantum mechanical wave properties to break through the energetic barrier (wall) and a reaction occurs. Credit Universität Innsbruck/Harald Ritsch Usage Restrictions Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. 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.