John Sader, University of Melbourne (IMAGE) University of Melbourne Caption Mathematics Professor John Sader from the University of Melbourne worked with California Institute of Technology experimentalists to invent a new method to weigh and image single molecules. Credit Photo: Peter Casamento 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.